Explain what would happen if plankton were removed from the marine food webs.
Pepsin, a common enzyme found in the stomach, is most active at pH values between 0.5 and 2.5. It works slowly between pH values of 2.6 and 3.4. Beyond a pH of about 3.5, it becomes completely inactive. Why does this happen?
B) The proteins chain in the enzyme is denatured, permanently inactivating it as the pH approaches
Pepsin is most active at pH values between 0.5-2.5 because it is the optimum pH range for this enzyme. As the pH increases or decreases beyond this limit, the activity of the enzyme decreases.
What is Optimum Condition?An optimum is the condition or extent of something to which an enzyme shows maximum activity. This range shows highest rate of chemical reaction, any disturbance in this range decreases the rate of a chemical reaction.
Each enzyme has a particular range of temperature, pressure, and pH at which it shows maximum activity. In case of pepsin, the optimum range of pH is between 0.5-2.5. At this range, maximum activity is observed. When the pH of solution is increased to 3.5, the proteins present in the enzyme denature which results in complete inactivity.
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Many bacteria are able to pass small pieces of the hereditary information on their DNA from one bacterial cell to another. This can sometimes result in an increase in the number of drug-resistant bacteria. What name is given to the process by which one bacteria transfers DNA to another
Answer:
The correct answer is: conjugation.
Explanation:
Bacteria are organisms capable of exchanging information with other individuals of their species, and they can do so through many mechanisms.
Conjugation is one of the ways in which bacteria can exchange information.
Conjugation refers to the transfer of DNA thanks to the direct contact between two bacteria and is mediated by plasmids (DNA molecules that are not chromosomal and locate in the bacterium's cytoplasm).
The conjugative plasmid resides in the donor cell. This donor cell produces a sex pilus that attaches to the recipient cell and thus they communicate to transmit the DNA from the donor to the recipient.
This process has clinical relevance since conjugation may increase the number of drug-resistant bacteria.
Two descriptions about physical quantities are given below: Quantity A: It has the same unit as force. Quantity B: It measures the amount of matter in an object. What quantities are these most likely describing?
Both Quantity A and Quantity B are mass.
Both Quantity A and Quantity B are forces.
Quantity A is weight and Quantity B is mass.
Quantity A is mass and Quantity B is weight.
I don't think it is b or d.
Quantity A is weight and quantity B is mass. So the correct option is C.
What is weight?
Weight is the gravitational pull of a second, much larger object, such as the Earth or Moon, on a first object. The universal law of gravity states that any two things will attract each other due to their masses with a force exactly proportional to the product of their masses and inversely proportional to the square of the distance between them.
This law is the source of weight. As a result, larger items naturally weigh more when placed in the same spot; yet, the weight of an object decreases the more it is from the Earth.
Therefore, the correct option is C.
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Of course! I'd be happy to provide a more detailed explanation. Quantity A: It has the same unit as force.This statement suggests that Quantity A is a physical quantity that is measured using the same unit as force. In the International System of Units (SI), the unit of force is the Newton (N). The Newton is a derived unit that represents the amount of force required to accelerate a one-kilogram mass at a rate of one meter per second squared. Quantity B: It measures the amount of matter in an object. This statement indicates that Quantity B is a physical quantity that is used to measure the amount of matter present in an object. The quantity that measures the amount of matter is called mass. Mass is a fundamental property of matter and is independent of the object's location or the force acting upon it. In the SI system, the unit of mass is typically measured in kilograms (kg). Based on these descriptions, we can determine the most likely quantities being described: Both Quantity A and Quantity B are mass. This option suggests that both Quantity A and Quantity B are referring to mass. It aligns with the statement that Quantity B measures the amount of matter in an object, as mass is the quantity that precisely does that. However, it contradicts the statement that Quantity A has the same unit as force, as force is measured in Newtons, not kilograms. Therefore, this option can be eliminated.Both Quantity A and Quantity B are forces. This option implies that both Quantity A and Quantity B are forces. However, the description of Quantity B as a quantity that measures the amount of matter in an object does not align with the concept of force. Force is a push or pull exerted on an object, while mass is the quantity that measures the amount of matter. Therefore, this option can be ruled out. Quantity A is weight and Quantity B is mass.This option suggests that Quantity A is weight and Quantity B is mass. Weight is a force that is dependent on an object's mass and the strength of the gravitational force acting on it. It is measured in Newtons, which is the same unit as force. Quantity B is described as measuring the amount of matter in an object, which aligns with the concept of mass. Since weight is a force and has the same unit as force, this option is correct. Quantity A is mass and Quantity B is weight.This option suggests that Quantity A is mass and Quantity B is weight. However, this contradicts the statement that Quantity A has the same unit as force, as mass is not measured in Newtons. Additionally, Quantity B is described as measuring the amount of matter in an object, which aligns with the concept of mass, not weight. Therefore, this option can be eliminated.In summary, based on the given descriptions, Quantity A is weight and Quantity B is mass. Weight is a force that has the same unit as force (Newton), while mass is a measure of the amount of matter in an object, typically measured in kilograms. Therefore, option C is your answer. If you have any further questions, feel free to ask!
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what happens when an enzyme's structure as it exceeds the typical human body temperature
Answer: the enzyme molecules gain kinetic energy, intermolecular bonds are broken, and eventually the enzyme structure itself breaks down
Explanation: [look at the picture]
which of the following are examples of matter? select all correct answers a. heat b.sunlight c.water d. grass e. air
In the given options, water, grass, and air are examples of matter, while sunlight and heat are not as they are forms of energy not substances with mass and volume.
Explanation:The examples of matter from the options you provided - heat, sunlight, water, grass, and air - include water, grass, and air. Matter is any substance that has mass and takes up space. This includes atoms and anything made up of atoms, like water molecules and nitrogen or oxygen molecules in the air. Grass, being a living organism, also consists of matter as it's made up of cells, which are composed of atoms.
Sunlight and heat, on the other hand, are forms of energy and not matter. Sunlight is a type of electromagnetic wave and heat is energy in transit, usually being transferred from a warmer object to a cooler object. These do not have mass or occupy space, so they are not considered matter. By understanding the definition of matter, one can better identify examples of it in everyday life.
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In your list, water, grass, and air are examples of matter as they have mass and occupy space. Heat and sunlight are not matter, they are forms of energy. therefore, option c,d and e are correct
Explanation:The examples of matter from your question are c. water, d. grass, and e. air. Matter is anything that has mass and takes up space, which includes all solids, liquids, and gases. Water is a liquid form of matter, grass is a solid, and air, even though it's invisible, is a gaseous form of matter. Heat and sunlight, however, are not considered matter but forms of energy.
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Populations of host organisms are most likely parasitized when _____.
A. they are overcrowded
B. they cannot escape
C. they are diseased
D. they have little to eat
Answer: A. they are overcrowded
A limiting factor is the factor which affects the growth, abundance and distribution of population of species in the living environment. It is of two types: density dependent factor and density independent factor. The density dependent limiting factor results in the change of the per capita population of the living species, with the increase in the density of the population of species. Density independent limiting factor affects per capita population of the living species, irrespective of the density of the population.
Parasitism is a phenomena in which one organism feeds over the body of other to meet it's food, energy requirements and to grow in numbers. Parasitism is a density dependent limiting factor because more denser the population more profound will be the effect of parasitism. As, parasites will get more number of hosts to acquire their food, and the infection will be transferred easily among large number of individuals in the population.
Hence, overcrowded population of host organisms is most likely to be parasitized.
Describe the eye of a hurricane
What is a dark area on the surface of the sun that is cooler than the surrounding areas
what is the volume of a locker that is 30 cm long, 40 cm wide, and 200 cm high
The volume of the locker: is 240,000 cubic centimeters.
Given the following data:
Length of locker = 30 cmWidth of locker = 40 cmHeight of locker = 200 cmTo find the volume of the locker:
Mathematically, the volume of a locker is given by the formula;
[tex]Volume = length[/tex] × [tex]width[/tex] × [tex]height[/tex]
Substituting the given parameters into the formula, we have;
[tex]Volume = 30[/tex] × [tex]40[/tex] × [tex]200[/tex]
Volume of locker = 240,000 cubic centimeters.
Therefore, the volume of the locker: is 240,000 cubic centimeters.
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when a non native species is imported into a new ecosystem the population sometimes runs wild. explain why this might be the case
Well, there are a few explanations to this questions that could be right, but let's go to the obvious one.
What can happen sometimes is that, when a new species is imported into a new ecosystem, it can cause some problems. For example, a plant is imported from Japan to Brazil and it is planted in the soil of a forest. This plant can either adapt to the environment or die because it's missing nutrients from Japanese soil. If this plant adapts, it can happen to in a way that this plant will take place of plants that usually were growing right there, taking their resources to grow up more and more, spreading fastly too. That is a process that can happen, it's a possibility, but, there's a very big chance of this happening in reality.
We can either mention the example of an animal, it's easier to understand, if we put a new animal into a new environment, it can go wild because this animal can start eating other animals, and that can cause a serious problem for their population, since it's going to start growing faster and faster, and once this happens, it'll will reach a limit line, and that line is the line of competition for food.
how much of a cell’s life is taken up by MITOSIS based on your data? 100=(16/36)*100
The total number of mitotic divisions in the formation of 64 daughter cells is A. 6. Therefore, A. 6 is correct .
To find the total number of mitotic divisions required to form 64 daughter cells, we need to consider the process of mitosis, which involves a single parent cell dividing into two daughter cells.
Each round of mitosis doubles the number of cells.
Starting with one parent cell, after the first round of mitosis, there will be 2 daughter cells.
After the second round, there will be 4 daughter cells. After the third round, there will be 8 daughter cells. This pattern continues, doubling with each round of mitosis:
1st round: 2 cells
2nd round: 4 cells
3rd round: 8 cells
4th round: 16 cells
5th round: 32 cells
6th round: 64 cells
So, it takes 6 rounds of mitotic divisions to produce 64 daughter cells.
Therefore, the correct answer is A. 6.
Each division in mitosis produces two daughter cells, so with each division, the number of cells doubles.
The number of divisions required to reach a certain number of cells can be found by determining how many times the initial number must be doubled to reach the desired number.
In this case, to go from 1 cell to 64 cells, the initial number (1 cell) must be doubled 6 times (2^6 = 64). Thus, there are 6 mitotic divisions.
Question
What will be the total number of mitotic divisions in the formation of 64 daughter cells?
A. 6
B. 32
C. 63
D. 16
What is an example of the negative effect of fossil fuels?
Fossil fuels cannot be used to heat homes
Fossil fuels have no negative effects
Fossil fuels cannot be used by everyone in the world.
Fossil fuels produce air pollution
Final answer:
Fossil fuels contribute to air pollution and global warming, detrimental to both human health and the environment. They also present risks during extraction and transportation, often leading to environmental disasters. Societal reliance on fossil fuels poses economic vulnerabilities and a lack of preparedness for a future with finite resources.
Explanation:
An example of the negative effect of fossil fuels is that their combustion leads to air pollution. The use of fossil fuels releases various pollutants that contribute to respiratory and cardiovascular problems in humans. Moreover, ecosystems are adversely affected worldwide, causing issues like acid rain, ozone depletion, and, significantly, global warming due to the greenhouse effect from increased levels of carbon dioxide. The climate change that results is driven by CO2 emissions, an unavoidable byproduct of burning fossil fuels. Additionally, the extraction of fossil fuels can be harmful to the environment, causing habitat destruction and water contamination, including significant incidents like the Deepwater Horizon oil spill.
On a societal scale, reliance on fossil fuels creates a vulnerability for economies, especially for countries without their own reserves or when faced with the prospect of depleting resources. Furthermore, the dependence on fossil fuels has led to a lack of planning for a post-fossil world, leaving us unprepared for a future where these resources are no longer available or affordable.
What is the difference between animal and plant cell cytokinesis?
A. Plant cells form a cell wall between the daughter cells.
B. Animal cells create two unequal daughter cells.
C. Plant cells pass on only half of their genetic material.
D. Plant cells have a cleavage furrow.
Answer:
This would be the correct answer. The only main difference between animal cell cytokensis vs plant cell cytokensis is the cell wall that animal cells lack. Animal cells get pinched into two daughter cells, by the cleavage furrow in the cell membrane, while the plant cell has to form a cell plate before it can create daughter cells.
Explanation:
A researcher is collecting qualitative data pertaining to social behaviors of deer at different times of the day. How will she most likely need to organize this data?
Answer:
data table
Explanation:
The researcher who is observing the social behaviour of a deer through out the day and is collecting the qualitative data and analyzing the social behaviour of the deer at different times of the day can be collected and stored in a data table which will be easiest and the most prominent way to analyze a data. Data table is useful to store more complex data. It is more popularly used in research, data analysis or communications.
You are a scientist working on geological dig. You discover a rock layer that contains 50 grams of a substance known to have a half life of 50,000 years. 50% of the substance is parent material and 50% of the substance is daughter material. How old is the rock layer in which you found this substance?
In sexual reproduction, parental _______ fuse to form a daughter cell.
A. Genes
B. DNA
C. Gametes
D. None of the above
(02.04 HC)As the climate changes, the average ocean temperature is rising. Using this information, predict what will most likely happen to El Niño events in the future.
El Niño events will intensify because they rely on warmer water sinking to the seafloor.
El Niño events will intensify because they will build on the already warm waters at the equator.
Some El Niño events will be stronger, but most will be weaker because the ocean currents are unpredictable.
El Niño events will become more similar to La Niña events and establish a new weather pattern.
Answer:
El Niño events will intensify because they will build on the already warm waters at the equator. Because the storms that drench the South, Central, and North America form fro, the equator and el niño's warm surface water. But leave the other coutries neglected and waterless.
Surface water, not water that travels to shallower depths.
Which of these units would be MOST useful for describing the speed of someone riding a bicycle?
A. cm/h
B. km/h
C. mm/s
D. cm/min
what is the meaning of cell
When nuclear power is harnessed, it is captured in the form of _____. steam that turns a turbine electrons that escape through a steel funnel heat that conducts over plastic tubing X-rays
Answer:
steam that turns a turbine
Explanation:
Answer:
When nuclear power is harnessed, it is captured in the form of _____.
heat that conducts over plastic tubing
steam that turns a turbineX-rays
electrons that escape through a steel funnel
Explanation:
All of the following are true facts about enzymes EXCEPT
A)all living cells have enzymes.B)life would not be possible without enzymes.C)enzymes can speed chemical reactions by 100s to billions of times.D)there are a few types of enzymes, but they each perform many types of reactions.
What was the role of technology in discovering the cell theory and why was it important
Technology, and specifically the advancement of microscopes, was fundamental in discovering and understanding the Cell Theory. Microscopes allowed the first observation of cells by Robert Hooke, and further refinements like the electron microscope revealed intricate cellular structures that deepened our understanding of biology.
Technology, particularly the invention and refinement of microscopes, played a crucial role in the development of the Cell Theory. In the 1660s, Robert Hooke was the first to describe cells by observing cork with a microscope he had refined. Following him, Anton van Leeuwenhoek utilized his self-crafted microscopes to observe and describe microorganisms, which established the existence of microscopic life.
The advancements in microscopy over the years, notably the transition from light microscopes to electron microscopes in the 1950s, revealed intricate details of the cellular structure that were previously invisible. This leap in microscopy was instrumental for scientists, who, leveraging the enhanced resolution, could observe tiny structures within cells, and even individual molecules and atoms. It was these technological advancements that confirmed the fundamental tenets of the Cell Theory postulated by scientists like Theodor Schwann and Matthias Jakob Schleiden, who proposed that all living things are composed of cells, and Rudolf Virchow, who later asserted that cells only arise from pre-existing cells.
Microscopes not only aided in the discovery of cells but also propelled the field of biology into the molecular era, giving rise to cell biology as a distinct field of study. With the electron microscope, our understanding of cell biology deepened, making significant contributions to medicine, genetics, and various branches of biology.
A student hypothesizes that a goldfish will be more active in a bowl that has red gravel than in a bowl of grey gravel. To get this hypothesis, the student places one goldfish in a bowl with red gravel and another goldfish in a bowl with grey gravel. The color of the gravel is the ______
Variable in the experiment.
Answer:
The correct answer will be- independent variable.
Explanation:
A scientific experimental design must include three types of variables which are independent variable (which can be manipulated), dependent variable ( which has to be tested and depending on the independent variable) and constant variable (which is kept constant).
In the given question, since the student wants to study the difference in the activeness of the goldfish in red and grey gravels, therefore, he performed the experiment with different gravels.
In this experiment, the independent variable is the color of the gravel as it can be changed as well as the dependent variable depends on this variable.
Thus, the independent variable is the correct answer.
A catastrophe changed the climate of an area, causing a number of species to become extinct in a short period of time. A few new species evolved in the short period of time and were well adapted to the new climate. If documented this would provide evidence for
From your knowledge about the distribution of electrons in the levels and from the atomic number (in parentheses), indicate the most likely charge on the ion when this atom forms an ion. (Remember the 2, 8, 18 level distribution.)
Hydrogen (1)
0
-1
+1
-2
+2
The Answer is C.+1
Cause i said +2 and i got it wrong and this is the right answer
How long does it usually take for a rock to undergo a stage within the rock cycle?
A. a few days
B. about one thousand years
C. from 300 to 400 years
D. thousands to millions of years
The stages in the formation of a rock are a factor of very long time period due to the chemical processes involved. Hence, a stage within a rock cycle usually takes thousands to millions of years.
The rock cycle describes the series of processes which rocks undergo during their formation into igneous, sedimentary and metamorphic rocks.
While igneous rocks are formed from the cooling and solidification of magma, sedimentary and metamorphic processes involves the burial or diagnesis of rocks over several thousands to millions of years under heat and and pressure.
Then buried sediments starts to compact as accumulation of sediments continues over Millions of years in continous procession.
Therefore, undergoing a stage within a rock cycle usually takes thousands to millions of years.
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If the same index fossils are found in two separate rock layers, the two rock layers most likely
Answer:
The answer is C. Were formed at the same time.
Explanation:
Which system is responsible for respiration in frogs?
Lungs
Tracheae
Skin
Gills
The alleles for a given trait seperate during meiosis is known as
Answer:
Mendels' first law. The Law of Segregation states that the two alleles of a given gene will be separate from one another during gamete formation (meiosis). law of independent assortment. the law that states that genes separate independently of one another in meiosis when forming gametes. dominant allele.
Explanation: