The cell membrane also known as the plasma membrane is the layer of the cell, which protects it from the external environment.
The correct options that hold true for cell membrane are:
It is composed of proteins and phospholipidsIt is located in plant cellsIt is located in animal cellsIt is semi-permeableCell membrane or plasma membrane is the semi-permeable membrane, which separates the cell from the external environment. The cell membrane also plays a crucial role in the protection of the cell.
The cell membrane is made up of proteins and lipids. The lipids of the plasma membrane are generally phospholipids and sterols.
The cell membrane is the characteristic feature of the plant and animal cells.
The cell membrane in both the functions of the cell similarly and have the same composition.
The membrane is semi-permeable, such that it allows the movement of certain molecules, and is impermeable to polar molecules.
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The cell membrane is made of proteins and lipids, it is found in both animal and plant cells, and it is semipermeable. It is not composed of proteins and cellulose, and it is not completely impermeable.
Explanation:The cell membrane is a critical part of the cell responsible for controlling what enters and exits the cell. The following are true regarding the cell membrane:
I. It is composed of proteins and lipids. This is true because the cell membrane is a lipid bilayer interspersed with proteins. It includes both peripheral and integral proteins.II. It is composed of proteins and cellulose. This is false. Cellulose is found in the cell wall of plants, not in the membrane.III. It is located in animal cells. This is true. The cell membrane is present in all types of cells, including animal cells.IV. It is located in plant cells. Also true, plant cells also have cell membranes, underneath the cell wall.V. It is semipermeable. It is indeed semipermeable, meaning it allows certain substances to pass through without allowing all substances.VI. It is not permeable at all. This is incorrect. The cell membrane is selectively permeable, not impermeable.Learn more about cell membrane here:https://brainly.com/question/13524386
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Match the following terms and definitions. 1. species that are adapted to live in equilibrium at carrying capacity population density 2. population growth that reaches equilibrium and carrying capacity population 3. death rate mortality 4. birth rate K-selected 5. a group of interacting individuals of the same species within the same geographic area natality 6. the number of organisms living in a particular area logistic growth
Answer:
1: species that are adapted to live in equilibrium at carrying capacity
K-selected
There are two types of specie based on the strategies they use for the reproduction, growth and survival. K and r selected species. The alphabet K simply indicate the carrying capacity or the number of individuals that can be supported by the habitat and available resources.
Some important traits of K selected organisms include: Low reproductive rate,Low offspring mortality, Strong competitive ability, Good parental care,Limited offspring dispersal and Strong competitive ability.
2. population growth that reaches equilibrium and carrying capacity population
logistic growth
Logistic growth is the type of growth pattern in which when the population reaches carrying capacity the growth rate of the population decreases. Carrying capacity is the highest number of organisms of a population that the environment can support.
3. death rate
Mortality or mortality rate is typically expressed in terms of deaths per 1,000 individuals per year; so, a mortality rate of 9.5 (out of 1,000) in a population of 1,000 would mean 9.5 deaths per year in that entire population, or 0.95% out of the total.
4. birth rate
natality
Birth rate or natality is simply indicative of number of individuals born per thousand of population per year.
5. a group of interacting individuals of the same species within the same geographic area
population
For example, a population of sparrows living on a certain area make a population of that area.
6. the number of organisms living in a particular area
population density
Population density is indicative of the number of population per unit area. For example: If there are 2000 human population living in an area of 25 sq km, the population density will be population divided by area, that will be equal to 80.
The nonpoisonous eastern scarlet snake has colored bands that closely resemble the poisonous coral snake. This selective adaptation provides the eastern scarlet snake with
Answer by YourHope:
Hi! :)
The nonpoisonous eastern scarlet snake has colored bands that closely resemble the poisonous coral snake. This selective adaptation provides the eastern scarlet snake with..?
Increased feeding opportunities!
:)
The colored bands on the nonpoisonous eastern scarlet snake closely resemble those on the poisonous coral snake. The eastern scarlet snake benefits from this selective adaptation to avoid predation.
What is predation?Predation is a biological interaction in which one organism, the predator, kills and consumes another, the prey.
The colored bands on the nonpoisonous eastern scarlet snake closely resemble those on the poisonous coral snake.
The eastern scarlet snake benefits from this selective adaptation to avoid predation.
Thus, the answer is to avoid predation.
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Describe sexual reproduction in plants
Sexual reproduction in flowering plants involves the production of male and female gametes, the transfer of the male gametes to the female ovules in a process called pollination. After pollination occurs, fertilization happens and the ovules grow into seeds within a fruit. its kinda like how humans work i guess.
What does the Hokkaido ken dog eat?
Final answer:
The Hokkaido Ken dog requires a balanced diet including proteins, carbohydrates, fats, vitamins, and minerals, consisting of meats, vegetables, and grains. Foods toxic to dogs should be avoided. Historical roles in hunting highlight their need for a nutritious diet to support an active lifestyle.
Explanation:
The Hokkaido Ken, a dog breed native to Japan, historically linked to the Ainu culture for hunting purposes, requires a balanced and nutritious diet similar to other dog breeds. The ideal diet for a Hokkaido Ken should encompass a mix of proteins, carbohydrates, fats, vitamins, and minerals to support their active lifestyle. This would typically include high-quality commercial dog food or a well-researched raw or cooked diet consisting of meats, vegetables, and grains. Proteins could come from sources like chicken, beef, fish, and lamb, while carbohydrates might be sourced from rice, potatoes, and vegetables. It is crucial to avoid foods that are toxic to dogs, such as chocolate, grapes, and onions.
Given their historical role in hunting alongside the Ainu people of Hokkaido, these dogs were partners in acquiring sustenance, which highlights their active nature and dietary needs. Despite this historical context, modern Hokkaido Kens are more commonly seen as family pets rather than hunting dogs, altering their dietary requirements to fit a less rigorous lifestyle. However, maintaining an appropriate diet remains vital for their health and well-being.
The body needs what in only small amounts, but these organic molecules are an important part in helping perform cellular reactions?
Answer:
Vitamins
Explanation:
Vitamins are the organic compounds that are needed by body in small amounts. Most of the vitamins are not synthesized in human body and should be supplemented with food. Vitamins serve as coenzymes or part of coenzyme which are required for the activity of respective enzymes. Hence, vitamins an important part in helping perform cellular reactions.
Explain the difference between a qualitative property and a quantitative property.
Quality means the standard of something as measured against other things of a similar kind, while quantity means the amount of something.
Qualitative properties are descriptions of qualities (like color or texture) that cannot be measured with numbers, while quantitative properties are measurable characteristics expressed numerically, often with units (like count or measurements).
In science, a distinction is made between qualitative and quantitative properties. Qualitative properties describe characteristics that cannot be measured with numbers but are observed as qualities, such as color, texture, or taste. For example, descriptions such as sulfur being yellow, a book being heavy, or a statue being beautiful are all qualitative in nature.
Quantitative properties, on the other hand, refer to characteristics that can be measured and expressed numerically, often with units. Examples include counting or measuring to determine that there are 25 students in a class, a book has 650 pages, or an object has a velocity of 66 miles per hour. Quantitative measurements are particularly useful in scientific research as they provide precise and analyzable data.
How did the Ptolemaic model differ from other proposed solar system models ?
The Ptolemaic model of the solar system was geocentric, meaning that it was the earth that was at the center of the universe — and everything revolved around it. The main difference between it and other models was that they were heliocentric, where it was the sun at the center of the solar system with the planets revolving around it.
Hope this helps!
Answer: The Ptolemaic model differs from other proposed solar system models because the planets have epicycles.
Explanation: Ptolemaic model believed that the earth is at the centre with the moon, sun, stars and other planets rotating or revolving around the earth. This model assumed that the planet moved in a circle. Thus, it is a model of the structure of the solar system.
Epicycles are orbits rotating on another circular orbit.
Drag each tile to the correct location. Sort the situations based on which part of the autonomic nervous system is at work. Ross feels nervous because he misplaced his important work documents. Dory sees a bear while hiking in the woods, and her heart rate increases. Maya feels her heart rate slow down after strenuous exercising. Rodrigo’s breathing increases when he hears a scary sound. Sofia’s muscles relax when she finds her missing cell phone Lisa feels calm after yoga class. Reset Next
The autonomic nervous system helps in regulating some processes which are without a person’s conscious effort. Some of these processes are breathing rate, blood pressure. The autonomic nervous system is divided into two parts- sympathetic and parasympathetic. In general, the sympathetic part prepares the body for an emergency situations such as sight or flight, whereas, the parasympathetic controls body process during normal situations.
Sympathetic part is at work in these situations:
Ross feels nervous because he misplaced his important work documents.Dory sees a bear while hiking in the woods, and her heart rate increases. Rodrigo’s breathing increases when he hears a scary sound.Parasympathetic part is at work in these situations:
Maya feels her heart rate slow down after strenuous exercising.Sofia’s muscles relax when she finds her missing cell phone.Lisa feels calm after yoga class.Answer:
in each section put in lef to right
Explanation:
Which type of spectrum can be produced by a solid, liquid, or gas?
discontinuous spectrum
emission spectrum
absorption spectrum
continuous spectrum
Answer:
continuous spectrum
Explanation:
The continuous spectrum, also called thermal or blackbody, is emitted by any object that radiates heat (that is, having a temperature other than absolute zero = -273 degrees Celsius). When its light is scattered, a continuous band appears with some radiation at all wavelengths. For example, when sunlight passes through a prism, its light is scattered in the seven colors of the rainbow (where each color is a different wavelength).
Which safety practice should always be done at the beginning and the end of a microbiology lab
Answer:
Hand Washing is one of the most important practices when it comes to avoid spreading germs due it helps removing microorganisms and potential pathogens that could be left on after regular activities which would alter the results of lab experiments, and also could easily remain after such lab experiments which could lead to the propagation of bacteria or harmful chemicals.
Explanation:
In a microbiology lab, always start and end with handwashing, wearing personal protective equipment, implementing disinfection protocols, and maintaining a sterile work environment. It's crucial to properly dispose of biological waste and routinely check the cleanliness of the lab.
Explanation:In a microbiology lab, certain safety practices should always be undertaken at the beginning and end of a lab session, including handwashing, wearing personal protective equipment, and implementing disinfection protocols. Handwashing is critical as per the CDC's recommendations, it should be done before and after the lab procedures, specifically in clinical or similar settings. Not only handwashing, but the use of personal protective equipment such as lab coats, face protection, and gloves is also mandatory to prevent potential contamination from microbes.
Furthermore, the laboratory surroundings should also be considered. Special protocols should be implemented to limit the risk of transmission such as the use of chemical disinfectant sprays upon entry and exit. Any contaminated specimens and equipment should be cleaned and soaked in basic solutions. Contaminated waste should be appropriately disposed of, often by incineration or autoclaving.
At the end of the lab, it’s recommended to check the effectiveness of these protocols by swabbing surfaces before and after use, ensuring that the sterile field has been maintained during lab operations. All these practices are crucial for the safety of both the personnel and the surrounding community.
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A student is observing a group of cells under a microscope. What observation would help her conclude that they are plant cells?
Answer:
The correct answer will be-
1. The presence of cell wall
2. The presence of chloroplast
3. A large vacuole
Explanation:
Plant cell posses three unique structural feature which includes the additional cell wall, an organelle containing a green pigment called chloroplast and
If a person has to identify the plant cell in a microscope then the person should look at these three mentioned structures-the additional cell wall, a double membrane structure and a large vacuole.
Thus, cell wall, chloroplast and the large vacuole are the correct answer.
Mutations within an organism can occur in body cells or reproductive cells. Which type of mutation is seen in a sperm cell but not in a skin cell?
A. somatic mutation
B. missense mutation
C. nonsense mutation
D. germline mutation
The answer is:
D. germline mutation
Hope it helps!
Answer:
D. Germline Mutation
Explanation:
It is Germline because Germline usually occurs in the Gametes. It is not Somatic because somatic could be a disease like cancer.
Luciferin is a molecule that, when broken down in fireflies, produces heat and light. The rate a which luciferin is broken down In cells is controlled by:
1. A carbohydrate
2. A simple sugar
3. An enzyme
4. A complex fat
HELP ME ASAP! I NEED THE ANSWER NOW PLZZZZ!!!!!! I DON'T UNDERSTAND THIS!
THIS IS REGIONS SCIENCE!
Answer:
Enzymes
Explanation:
Enzymes are the biocatalyst that serves to speed up the rate of chemical reactions by lowering down the required activation energy. They are proteins and are not used up during the reactions. Breakdown of luciferin is also regulated by the enzyme. Carbohydrates and fats serve as energy source mainly. Simple sugar is also a carbohydrate and serves as an energy source.
A material is biodegradable if?
Answer:- A material is considered biodegradable if it can be broken down by biological processes.
Explanation:-
1. There are many living organisms such as bacteria, fungi and other microbes that feed on organic matter and convert them into simpler forms.
2. Due to the enzymes released by such microbes, all the materials such as food refuse, tree leaves, grasses etc. are considered to be biodegradable as they are capable of being broken down by them.
3. The materials that cannot be broken down by such living organisms are considered to be non biodegradable.
4. The non biodegradable substance produce a problem in the environment as they persist for a long period of time and also form a major source of pollution for soil and water. Further, they may also cause harm to other living organisms present in the environment.
5. Example of a non biodegradable substance is plastic.
A scout on a hike becomes lost. He does not have a compass, but he does have a small needle, a magnet, and some water. He magnetizes the needle and then gently places it on the surface of the water, where it points to the north. What property of the water makes it possible for the needle to lie on the surface of the water?
A. viscosity
B. definite volume
C. surface tension
D. boiling point
Answer:
C. surface tension
Explanation:
Surface tension refers to the property of water or any liquid to enhance its surface area by a certain amount. It is a very important property of water due to which it resists any external force due to cohesive nature of water molecules.
How surface tension help needle to float on water:
It is a property of water which enhance the attractive force between needle and liquid.
The molecules on the surface of water do not have any force acting from upwards because that side is exposed to atmosphere. This causes a downward force but no upward force on upper surface,so the molecule of surface tend to stay together by forming a thin sheet or imaginary layer.
If weight of any material cannot break surface tension it will float on water surface. This is what happens with needle.Therefore, when needle is placed on water surface with alot of care in horizontal direction, it will not break surface tension and hence will float on water. Please see attached image for better understanding.
Hope it clears up the picture!
In order to study genetic mutations, scientists must study genetic material. which statement describes the genetic material scientists are most likely studying?
A) They study alleles that contain chromosomes, which are RNA.
B) They study alleles that contain genes, which are chromosomes.
C) They study chromosomes that contain genes, which are DNA segments.
The answer should be C because the DNA in the genes is what causes genetic mutations. The sequence differs from what is found in most people. Mutations range in size; they can affect anywhere from a single DNA building block (base pair) to a large segment of a chromosome that includes multiple genes.
Answer: option C They study chromosomes that contain genes, which are DNA segments.
Explanation: chromosomes carry genetic information which is stored in genes. Genes are DNA segments which are located on the chromosomes. Genes codes for a certain protein which performs a particular function.
Change in the original DNA sequence leads to genetic mutations. So in order to study genetic mutations, scientists must study genetic material.
Which of the following cells would most likely have the greatest concentration of densely packed rough endoplasmic reticulum
what are the options though....
A pancreatic cell engaged in the production of digestive enzymes
should be the answer ur looking for
Cells that produce and secrete proteins, like liver and pancreatic cells, have a high concentration of rough endoplasmic reticulum. This is due to the role of the rough ER in protein modification and secretion. The smooth endoplasmic reticulum, lacking ribosomes, has different functions.
Explanation:The cells that would most likely have the greatest concentration of densely packed rough endoplasmic reticulum (RER) are those involved in producing and secreting proteins. This is because the RER's key function is to modify proteins for secretion from the cell. The ribosomes studded on the RER surface give it a 'rough' appearance and are sites of protein synthesis.
Two types of cells that are characteristic of having an abundance of RER are liver cells and pancreatic cells. For instance, liver cells are known to produce various proteins involved in numerous bodily functions, while pancreatic cells synthesize and secrete digestive enzymes.
On the other hand, the smooth endoplasmic reticulum (SER), which lacks ribosomes, is involved in different functions - such as the synthesis of carbohydrates, lipids, and steroid hormones, and the detoxification of various substances.
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Which statements describe earthquakes? Check all that apply.
They release energy.
They are caused by forces.
They begin at the epicenter.
They can lead to massive damage.
They result from movement on Earth’s surface.
They release energy
They are caused by forces
They can lead to massive damage
I think these are the correct answers let me know if I am correct or not.
The shaking of the Earth's surface, taking place due to the sudden discharge of energy in the lithosphere of the Earth, which leads to formation of seismic waves is known as an earthquake. The earthquakes are generally caused when the rocks present underneath gets break abruptly along a fault.
This sudden discharge of energy makes the seismic waves resulting in shaking of the ground. When the two plates or the two rocks gets rubbed against each other, they slightly stick with each other. The sliding does not take place smoothly, and after some time, the rocks get dissociate, resulting in an earthquake. The earthquakes can result in massive destruction depending upon its intensity.
Hence, the correct options are they release energy, they are caused by forces, and they can lead to massive damage.
which is the primary process by which evolution of life on Earth occurs?
natural selection
acquired characteristics
vestigial retention
speciation
Answer:
natural selection
Explanation:
There are many processes through which evolution can occur like migration, mutation, genetic drift and natural selection. However, one of the most important triggering factor for evolution is natural selection .
What is natural selection:
In very simple words it can be considered as the process through which organisms that are better able to adapt to their surrounding environmental conditions survive and thrive, thereby they reproduce and transfer their characteristics in offspring, but those that have less ability to adapt to environmental conditions, tend to become less in number and ultimately eliminate.
How natural selection leads to evolution:
Now to understand how natural selection leads to evolution, we will take example of a population of beetles, some are brown and some are green in color. Now environment has limited capacity and it cannot support the survival of each and every population.
Here what happens is the green beetles are vulnerable to attack by birds because their color is visible to birds but brown beetles are less visible. What will happen that green beetles will be all eaten by birds and brown will keep surviving.
Now years later, beetles will have only brown color because evolution occurred and only fittest ones survive.
This is how natural selection leads to evolution.
Hope it helps!
It has been found that a low moisture level in the environment reduces the activity of microbial enzymes. Explain why the rate of nitrate formation in soil is expected to be lowest during dry summers.
Final answer:
During dry summers, microbial enzymes are less active due to lower soil moisture, leading to reduced rates of nitrate formation as microbial activities like denitrification are slowed down.
Explanation:
The rate of nitrate formation in soil is expected to be lowest during dry summers because microbial enzymes are less active with low moisture levels. Microorganisms, including those involved in the nitrogen cycle, require a certain level of water activity (aw) to grow and perform metabolic functions such as denitrification. Denitrification is a process that reduces nitrate (NO3) to produce nitrogen gases, including nitrous oxide (N2O), which can be a greenhouse gas. However, during dry conditions, soil water content drops, limiting the microbial activity and thus the rate of nitrate transformation.
Soil moisture is crucial for microbial activity and the chemical reactions they facilitate. Bacteria generally require high water activity levels to function effectively. In contrast, fungi can tolerate a broader range of moisture levels. With less water available in the soil during dry periods, bacteria that contribute to denitrification and nitrate respiration are inhibited, leading to lower rates of nitrate formation in the soil. The proper balance of carbon, nitrogen, and moisture is essential for the decomposition process carried out by these soil organisms, which affects nutrient availability for plants.
The three particles that make up atoms are
Answer: Protons, Neutrons and Electrons
Explanation: The nucleus (center) of the atom contains the protons (positively charged) and the neutrons (no charge).
A food company has designed new types of breakfast cereal and is now working to decide which cereal to mass produce and begin selling. They can measure some traits of the cereals with scientific tools, but they also use small surveys to ask cereal buyers about their opinions. Which question could most likely be answered scientifically by the food company? Which cereal's box is the best color? Which cereal tastes the best to every eater? Which cereal contains the most sugar? Which cereal would sell the most boxes?
The food company’s questions are best answered by a combination of survey and scientific tools. To answer questions such as ‘which cereal's box is the best color?’ and ‘which cereal tastes the best to every eater?’ as well as ‘which cereal would sell the most boxes?’, the food company would need to conduct a survey to a group of people which resembles their target group most. The result would help them in answering those questions.
However, to answer ‘Which cereal contains the most sugar?’, the food company would need to use scientific tools to measure to sugar content in the cereal. This is the answer.
Answer: Which cereal contains the most sugar?
Explanation:
A scientific question can be define as the question which can only be answered by using experimentation procedures.
In the given condition, Which cereal contains the most sugar? The food company can conduct experimental trials to know the content of sugar. Hence, it is a scientific question.
A location from which the distance to an object is measured is its _____.
A. position
B. coordinate
C. displacement
D. reference point
Hello
The correct answer is A. position
Hope this helps
Plz mark me as Brainliest
Answer:
D. reference point
Explanation:
A reference point defined according to space-time coordinates allows to determine the position of another point in space. It allows measuring the distance at which the object is. These points are assumed fixed in the Universe.
Gina is scuba diving when she notices a large fish glide over her. It has a flattened body and she notices gills on its underside. Which taxonomic group does the fish belong to? A. Selachii B. Batoidea C. Sarcopterygii D. Actinopterygii
Your answer is A
Selachii to be a class or subclass that contains all the modern sharks and rays
Gina described a manta ray
Answer:
The correct answer is B. Batoidea
Explanation:
Batoidea is an order of cartilaginous fish which are commonly known as rays. Rays are morphologically different from sharks as their body is flattened and disk-like with very large pectoral fins.
In rays, mouth and gills are present on the underside of the body. They have five gills that are used for the diffusion of gases and are present on its ventral side but in sharks, gills are present on the side of their head.
Their flattened body helps them to hide in the sand of the ocean floor which prevents them to become prey to large predators like sharks and killer whales. Therefore the right answer is B. Batoidea
Only 10 percent of the energy stored in an organism can be passed on to the next trophic level. of the remaining energy, some is used for the organisms life processes and the rest is...
The rest is eliminated as heat.
Answer:
D
Explanation:
Eliminated as heat
he diagram illustrates one method of genetic recombination. Which method of genetic recombination is illustrated in the diagram? crossing over independent assortment fertilization tetrad formation
It would be helpful if you had the diagram but I believe the answer is A. crossing over
Answer:
A. crossing over :)
Explanation:
Carbon dioxide (CO2) combines with a five-carbon compoundIn one to three sentences, describe what happens during the reduction stage of the Calvin cycle.
We are well aware that there are two stages of photosynthesis:
Light dependent reactions Light independent reactions/ Calvin cycle/ dark reactions.Calvin cycle or light-independent reactions:
This comprise the process during which carbon dioxide enters into the leaves of plants and passes through series of steps to form sugar or food. This process depends on the supply of ATP, (the ATP that is formed previously during light dependent reactions).
Now there are three stages of Calvin cycle:
1) carbon fixation 2) reduction 3) regenerationDuring the process of carbon fixation CO2 combines with a 5-carbon compound called RuBP or ribulose-1,5-bisphosphate which results in the synthesis of a 6-carbon compound that splits up in to 2 three carbon compounds called phosphoglyceric acid (3-PGA).
Here out focus will be the process of Reduction.
Reduction is the second stage of Calvin cycle during which phosphoglyceric acid (3-PGA) is converted to glyceraldehyde-3-phosphate (G3P) that is a sugar. During the process of reduction, energy in the form of ATP and NADPH are used for the conversion of 3-PGA to G3P. As 3-PGA is reduced to G3P, therefore this process is known as reduction.
After reduction, a series of reactions occur that lead to the synthesis of glucose but since focus of our question was reduction, so you can see more details of the process in attached figure.
Hope it helps!
True or False? The actual neutron of a technetium atom is physically different than a neutron of a helium atom.
Compare primary and secondary pollutants. Which is more harmful ?
your answer is correct
Both WOULD be equally harmful. Primary pollutants are pollutants that are directly emitted from a pollution source. Secondary pollutants are created as a result of interaction in the atmosphere of primary pollutants. Primary pollutants can be as harmful as secondary pollutants. Therefore your answer is correct.
a characteristic that distinguishes most plants from animals is
A.means of locomotion
B.chloroplast
C.symmetry
D.color
B. Chloroplast
A chloroplast is an organelle found in the cells of green plants, it basically turns the plants green, animals do not have chloroplasts.
Answer:
chloroplasts
Explanation: