The dermis, the skin's next layer, is a thick layer of fibrous and elastic tissue (made mostly of collagen, with a small but important component of elastin) that gives the skin its flexibility and strength. The dermis contains nerve endings, sweat glands and oil (sebaceous) glands, hair follicles, and blood vessels.
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Structures found in the dermis are collagen, elastic fibers, and extrafibrillar matrix.
Structural components of the dermis:The dermis or corium is a layer of skin between the epidermis and subcutaneous tissues, that primarily consists of dense irregular connective tissue and cushions the body from stress and strain.
Structural components of the dermis are collagen, elastic fibers, and extrafibrillar matrix. It also contains mechanoreceptors that provide the sense of touch and thermoreceptors that provide the sense of heat.
Collagen: Collagen is the main structural protein in the extracellular matrix found in the body's various connective tissues.
Elastic fibers: In the dermis of animals with single, primary hair follicles are derived from cells lining the hair follicle or from the ends of the pili muscle, which anchors the muscle to the matrix or to the hair follicle. Each follicle is interconnected with elastic fibers.
Extrafibrillar matrix: The dermal material lying outside the cells, and not consisting of either collagen fibers or elastic fibers, is called the extrafibrillar matrix.
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Can someone please help me with this one problem I don’t understand it.
which information do tiny fossils found in drilling samples from earths crust reveal about earths history?
Answer: microfossils help us decode the climate and what the ecosystem was like in the past.
Explanation:
Fossils are any remainder or evidence of an organism that lived long ago. The preserved remains of living beings or their traces of the past are documents of the history of life on planet Earth.
Depending on their size, they are classified as microfosiles or macrosophiles.
Macrophiles are visible sized fossils, such as bones, shells or petrified wood. While the microfossils are seen with the microscope. They are important for correlating sedimentary layers, when looking for oil, and they help us decipher the climate and what the ecosystem was like in the past. Examples of microfossils are diatomaceous, radiolaria and foraminifera.
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I hope it helps you. Regards. María
Answer:
changes in climate
Explanation:
which object would take the most force to hold up in the air ? A. a bus B. a chair C.a balloon D. a nail
Hello! Well, this is just a common sense question, lets think about this on terms of weight, a bus is about 33,000 pounds, and you would need over a ton of helium to lift that force up. The other three would be the lightest so according to the weight of the Bus, that would be the answer. Good Luck!
Answer:
a bus
Explanation:
It takes more force to hold a heavier object up in the air because gravity pulls down with more force on objects that have more mass. A bus is the heaviest object, so it would take the most force to hold up in the air.
The images show the wings of a bat and a bee. From this evidence, what can you conclude about the evolutionary relationship between these organisms?
i definitely different
Answer:
A.
The wing structures of the bat and the bee are different, indicating they didn’t inherit wings from a common ancestor.
Complete the sentence about the continental drift theory
Alfred wegener proposed the theory of continental drift after he saw that the coasts of ___ and ___ looked like two interlocking puzzle pieces
1. A. Eastern Africa
B. Northern Africa
C. Western Africa
2. A. Eastern North America
B. Eastern South America
C. Western South America
The correct answers are:
1. C. Western Africa;
2. B. Eastern South America;
Alfred Wegener has spent lot of times looking at maps, as it was his job. One day he noticed something peculiar, the western coast of Africa and the eastern coast of South America were an almost perfect match. They looked like peaces of puzzle that belong together. In his mind this was suggesting that these two continents had been merged in the past, and than broke apart. He later got proof about his theory by observing the sea mounts in the Atlantic Ocean.
Answer:
c. Western Africa
B. Eastern South America
Explanation:
Which of the choices below gives a true example of how a natural resource can be renewed?
When an area's natural gas has been used up, oxygen can replace the gas.
When forests have been cut down, new native trees can be planted.
When all of the coal is gone from a mine, new coal can be grown in its place. When the wind is calm, electric fan can be turned on to make the windmills move.
When the wind is calm, electric fans can be turned on to make the windmills move.
When forests have been cut down, new native trees can be planted
A. When an area's natural gas has been used up, oxygen can replace the gas.
The goal of science is to explain natural phenomena .true or false
False, science aims to explain and understand. Science as a collective institution aims to produce more and more accurate natural explanations of how the natural world works, what its components are, and how the world got to be the way it is now.
Answer:
True
Explanation:
I took a test with that question and got it right.
how is sanitary landfill different from dump
A sanitary landfill is an engineered site designed to manage waste with protective measures such as liners and leachate treatment, while a dump is an unregulated site that poses environmental risks.
Explanation:How is a sanitary landfill different from a dump? A sanitary landfill is a carefully designed structure built into or on top of the ground in which waste is isolated from the surrounding environment. This isolation is accomplished with a bottom liner and daily covering of soil. Landfills also have systems to manage leachate, which is contaminated water that moves through or drains from a landfill, and to collect and treat landfill gas. On the other hand, a dump is an area where trash is simply deposited and sometimes burned without any measures to protect the environment, leading to problems such as air pollution, smog, and potential groundwater contamination due to absence of linings and leachate treatment systems.
What two factors affected the development of new species
The development of new species is influenced by environmental conditions and geographic separation, leading to genetic isolation and speciation through adaptation to new ecological pressures and different environments.
The development of new species is primarily influenced by two factors: environmental conditions and geographic separation.
Environmental changes, such as a significant drop in water level, can cause a population to split into two groups, leading to a small subsection of the population being exposed to new ecological pressures. This smaller group's gene pool can quickly evolve if a favorable trait emerges, contributing to the rise of new species.
Additionally, geographic separation can lead to speciation by isolating portions of a population in different environments, prompting them to adapt in diverse ways. For example, mammals living in mountainous regions may evolve increased fur for the cold, while those in lowlands develop differently. Over time, these adaptations may lead to the formation of new species as these groups experience genetic isolation.
Most of the rocks we study were formed in what era?
A.Cenozoic
B.Paleozoic
C.Precambrian
D.Mesozoic
Answer: Paleozoic
Explanation:
Not as many rocks existed from the precambrian era
True or false: when maintaining good posture the body alignment favors the position that requires the least amount of muscular work and places the most strains on muscles, ligaments, and bones.
FALSE
"Good posture involves training your body to stand, walk, sit, and lie in positions where the least strain is placed on supporting muscles and ligaments during movement or ... The spine's curves work like a coiled spring to absorb shock, maintain ... be at eye level, head position should include ears aligned with shoulders."
My source is https://mayfieldclinic.com/pe-posture.htm
plz give me a brainliesttt
This is false.
Hope this helps.
Match each vocabulary word to the correct definition.
1.
Annealing
2.
Complimentary base pairings
3.
CODIS
4.
Buccal cells
5.
Chromosomes
a.
A software program that contains DNA profiles of convicted offenders, missing persons, crime scene evidence, and other sources.
b.
Pairings on the DNA strand.
c.
The process of reforming a double DNA strand.
d.
Cells from the lining of the inner cheek.
e.
Rod-like structures that contain genetic material.
Annealing --> The process of reforming a double DNA strand
CODIS --> A software program that contains DNA profiles of convicted offenders, missing persons, crime scene evidence, and other sources.
Buccal Cells --> Cells from the lining of the inner cheek
Complimentary base pairings--> Pairings on the DNA Strand
Chromosomes --> Rod-like structures that contain genetic material
Hope this helps! Message me if you need help or have any questions! :)
Answer:
Rod-like structures that contain genetic material
Explanation:
Which is the following could be caused by a decrease in carbon fixation?
A. a decrease in the total biomass if producers in the world
B. an increase in the size of insects and arthropods
C. a decrease in total biomass of consumers in the world
D. all of these
im not 100% sure but i believe the answer is B. an increase in the size of insects and arthropods
Answer:
a decrease in the total biomass of consumers in the world
Explanation:
A decrease in carbon fixation would likely increase the amount of carbon dioxide in the air and decrease the amount of oxygen. This would change how much respiration and photosynthesis could take place, resulting in:
a decrease in the total biomass of consumers in the world,
an increase in the total biomass of producers in the world, and
a decrease in the size of insects and arthropods, since their ability to move oxygen from the air into and through their bodies is limited.
How often does the body perform cellular respiration? once in the morning and once at night only at night continuously only when the body runs out of ATP
continuously
its breaking down the chemical bounds in ATP and its energy is essential for survival
Answer: Constantly
Explanation:
Cellular respiration is a kind of metabolic process by which the carbohydrates of the body are broken down into ATP molecules in the presence of oxygen.
The energy is stored in the bonds of ATP molecules which is released when the bonds are broken.
The cells of the body needs energy continuously so the cellular respiration occurs constantly.
In a laboratory population of flies, the female flies are gray and the males are yellowish gray. Biologists observed that all the male flies had an equal chance for reproduction, but the male flies with the brightest colors were more likely to successfully reproduce. What phenomenon could explain such a change?
Answer:
The correct answer is sexual selection.
Explanation:
Sexual selection is illustrated as a medium of natural selection that comprises a selection of mates of the contrary sex by the individual of one biological sex, and at the same time competing with the individuals of the similar sex for the members of the contrary sex.
As in the given question, the male flies exhibiting brightest colors are more effective in reproducing in comparison to the male flies exhibiting light colors, it shows that the phenomenon of sexual selection is taking place.
As a result of these processes, the single celled organism accomplishes
1)Gamete production
2)energy production
3)sexual reproduction
4)asexual reproduction
Answer:
The correct answer is option 4 (asexual reproduction).
Explanation:
Asexual reproduction is a type of reproduction in which an organism produces genetically identical offspring's to the parents without involving contribution of genetic material of another individual. It is primary form of reproduction for single-celled organisms.
Mechanism of asexual reproduction involves:
1. Nuclear division- marked by the synthesis of DNA and
2. Cytokinesis- marked by the division of the cell into two identical daughter cells.
Asexual reproduction do not involve fertilization, reduction in chromosome and meiosis.
So, exact copies of parent cells are produced with identical genetic material content.
Thus, option 4-asexual reproduction is the correct answer.
As a result of these processes, the single celled organism accomplishes gamete production, energy production, reproduction of both types. All options are correct.
Several critical processes are carried out by the single-celled organism:
Gamete production: Gametes, which are specialised cells engaged in reproduction, are produced by single-celled organisms to reproduce sexually.
Energy production: Single-celled organisms, like all living things, require energy to carry out their biological functions.
Gamete fusion reproduction: Single-celled organisms may reproduce, integrating genetic material from two parents to generate children with distinct genetic characteristics.
Asexual reproduction: Many single-celled organisms may reproduce asexually in addition to sexually.
Thus, all options are correct.
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Which of the following is maintained across the terminals of a battery?
a) a potential difference
b) a voltage drop
c) an electric charge
d) both A and B
Answer:
Option D, both A and B
Explanation:
The potential difference is created across a battery (between its two terminal –one positive and the other one negative) when work is done to move a charge from one point to another. This potential difference is measured in volts. 1 volt is the potential difference between two points when one joule of potential energy is spent to move a charge of one coulomb from one point to the other.
Voltage drop across a circuit is the amount of electric current lost due to resistance/ impedance with in the cables of the circuit.
Hence, both potential difference and voltage drop occurs across the circuit,
Option D is correct.
Identify the properties of heat as it relates to the molecules within a body
At the molecular level, the heat comes from the agitation of the molecules and therefore their atoms. This increase in agitation causes the molecules to be less condensed between them and will separate after breaks in the intermlecular bonds. This distends the material, as we see when we heat a metal, or a transformation of the phase of the material, such as melting ice or boiling water.
An enzyme is a form of what
Answer:
Proteins.
Explanation:
Proteins are made of the polymers of the amino acids that are linked together through the peptide bond. The proteins are the important biomolecules of the living organism.
The enzymes are made of the proteins. Each enzymes shows the important specific sequence of the amino acids. These enzymes are used in the metabolic reaction for the efficiency of the reaction and increases the rate of a reaction.
Thus, the answer is proteins.
Which of these would help reduce the amount of carbon dioxide produced from your answer from question 1
A). Add a plant to the flask
B). Add a goldfish to the flask
C). Remove a plant from the flask
D). Do nothing else to carbon dioxide will naturally become diluted
A, because plants consume carbon dioxide and produce oxygen
Add a plant to a flask
Jazelyn needs to create a project that shows reproductive isolation in action and decides
Here is the complete question:
Jezelyn needs to create a project that shows reproductive isolation in action and decides to make a video. Which of the following would make the best project?
A. A video that shows a large river that has penguin populations on both sides.
B. A video that shows penguin species that have different mating dances.
C. A video that shows a penguin that is laying eggs.
D. A video that shows penguins in a tidal pool and an open ocean.
ANSWER
The correct option is B.
Reproductive isolation refers to evolution mechanisms that make it impossible for member of different species from successfully mating or producing fertile offspring. There are two different types of barriers that can prevent different species from mating, these are prezygotic and postzygotic barriers.
Prezygotic barriers are those hindrances that prevent different species from producing offspring by preventing formation of zygote. An example of this barrier is difference in courtship behaviors. Post zygotic barriers prevent offspring produced by different species from being fertile, that is, they are sterile.
Answer:
b
Explanation:
Examine the air pressure map.
Which type of line is shown on the map?
isobar
isotherm
radar
humidity
The correct answer is - isobar.
The isobars are closed lines that are connecting spots with the same air pressure, thus giving us information about the air pressure in certain places. The air pressure can be standard, low, or high. The standard air pressure is 1013.25 mbar, the low air pressure is bellow the value of the standard one, and the high air pressure is above the standard one.
The low air pressure means that there are warm air masses in the area, or more water vapor in the atmosphere, while the high air pressure means that there are cold air masses present in the area. The reason why the warm air masses have low air pressure is that they are less dense, thus have less mass, and make less pressure, while the cold air masses are denser, have more mass, and make more pressure.
The unit most commonly used for measuring the air pressure is milibar (mbar)
Answer:A
Explanation:
The term vestigial comes from the Latin word vestigium, which means track or footprint. Explain how this relates to the meaning of vestigal structures
If a liter of water is heated from 20 C to 50 C, what happens to its volume? a. The volume decreases. b. The volume increases. c. The volume first increases, then decreases. d. The volume first decreases, then increases.
If a liter of water is heated from 20 C to 50 C, the volume will increase.
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Answer:
b.The volume increases.
Explanation:
We are given that a litre of water is heated from 20 degree celsius to 50 degree celsius .
Volume of water= 1litre
Volume of liquid is directly proportional to temperature
When volume of liquid increases then temperature is also increases .
When temperature is increases then the volume is also increases .
When temperature decreases then the volume of liquid decreases.
When temperature is increases from 20 degree celsius to 50 degree celsius then the volume of water increases.
Hence , option b is true,
Answer :b.The volume increases.
Which statement does NOT correctly describe our sun? A. Our sun is an average sized star B. Our sun is a very old star C. Our sun has an average brightness D. Our sun is yellow-white
C, because the magnitude is -26.74
Final answer:
The incorrect statement about our Sun is that it is a very old star, whereas it is actually a middle-aged yellow dwarf star with average size, brightness, and a yellow-white color, expected to remain stable for about 5 billion more years.
Explanation:
The statement that does NOT correctly describe our Sun is that 'Our sun is a very old star.' Our Sun is not considered to be very old in astronomical terms. Instead, it is a middle-aged star that has been a main-sequence star for about 5 billion years and will remain in this phase for approximately 5 billion more years. The Sun is a yellow dwarf star that is average in size, brightness, and color, described as yellow-white. Comparing a red dwarf and a yellow dwarf of equivalent size, the yellow dwarf will have a greater temperature; the assertion that this is because yellow light has lower frequency is not the reason—temperature in stars is related to the mass and internal processes rather than the frequency of the light they emit.
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Which group of animals could be correctly classified as ectothermic?
Question 2 options:
robins, squirrels, mice
bears, snakes, wolves
frogs, lizards, snakes
bears, snakes, wolves
frogs, lizards, snakes
Explanation;Ectotherms are animals that primarily gains heat through the environment. Most mammals, including humans, as well as most birds are endothermic homeotherms, while most fish, invertebrates, reptiles, and amphibians are ectothermic poikilotherms. Ectothermic do not require energy to heat themselves, and can spend their energy on reproduction, which in some environments is more valuable than staying active in cold weather.Emma is curious to see how fertilizer makes a plant grow larger. After doing some research, she believes that the chemicals within the fertilizer will make a plant increase in size. She also believes that plants that do not receive fertilizer will be smaller in size. Emma plans to put the same type of plant seed into 6 pots containing soil and fertilizer and monitor how the plants grow. She runs out of fertilizer, though, and decides to put sand into 3 of the pots instead of fertilizer and soil. After the experiment finishes, Emma observes that the plants that had fertilizer grew much larger than the plants with sand. She finally concludes that fertilizer greatly increases the size of a plant. Why is her conclusion invalid?
Her conclusion is invalid because using sand instead of soil slows down plant growth. Fertilizer, on its own, does not 'greatly' increase the size of the plant.
The correct way to do this experiment would be to keep all other parameters same, except the fertilizer. This will give her accurate results.
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Why are certain traits adaptations in one ecosystem, but not in another? A. All ecosystems have the same amount of competition. B. Organisms can learn new adaptations. C. Ecosystems can have different conditions. D. Organisms lose adaptations when they migrate.
i am going to choose c because i think it is correct
Answer: C. Ecosystems can have different conditions.
Explanation:
Adaptations are the changes that occur in the physiology, genome, morphology and the behavior of the organisms so as to support their survival in the adverse environmental conditions. An ecosystem is a biotic community where the living beings interact with their non-living environment. The abiotic (non-living) and biotic (living) factors may vary from ecosystem to ecosystem depending upon the location.
Certain traits adaptations can be seen in one ecosystem but not in another this occurs due to the fact that C. Ecosystems can have different conditions. Organisms adapt according to their environment. For example, a white coat over the hare species will help the population to remain insulated and protected against the predators in snow region but the same species when exposed to tropical forests will not be able to survive due to excess warm temperature and will be detected by the predators easily.
4. How does Pasteurization affect the number of bacteria present in milk?
Pasteurized milk doesn't contain these beneficial bacteria, although some good bacteria can be regained by culturing the milk into such foods as yogurt or kefir.
How is mitosis different from meiosis
I believe Mitosis is your individual cells dividing and meiosis is you and the males cells dividing but I might be wrong I'm not good at this subject sorry
Answer:
Mitosis produces 2 daughter cells with the same number of chromosomes as the parent cell while Meiosis results in 4 daughter cells with half of their parent's chromosomes.
Explanation:
Cells divide and reproduce in two different ways that are mitosis and meiosis. The fundamental difference in both cell division is that mitosis results in 2 identical daughter cells, but meiosis results in 4 sex cells with half chromosome numbers.
In mitosis, daughter cells are genetically identical , creates all body cells apart from sex cells and no recombination occurs, whereas daughter cells are different, creates only sex cells, and recombination occurs in meiosis.