What part of the cell theory explains why your skin is able to repair itself after being cut

1 answer:

6 0

Cells are created from existing cells is the part of the cell theory which explains why the skin is able to repair itself. The body produces 300 million new cells every day. After getting a cut or scratch, the skin may start bleeding. This happens when the injury tears down the tiny blood vessels that is found under the skin’s surface. The body wants to stop the bleeding so the platelets will come to the rescue.

At the cut, platelets stick together. This is how the blood clots which then become a scab. This protects the area so the cells underneath it can have the time to heal. Beneath the scab, new skin cells multiply to repair the wound. Damaged blood vessels are restored and blood cells end the infection in the wound. And also, under the scab, a new skin layer is formed.

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In ostriches, there are 2 types: ones that run fast and those that run slowly. The fast birds can reach up to 40 miles an hour.

liraira [26]

Answer:

Natural selection will select the type of ostriches that can run up to 40 mph.

Explanation:

According to the theory of natural selection, organisms with favorable traits following their environment are more likely to reproduce. In doing so, they pass on the better traits to their next generation for the survival of their species.

This process allows organisms to adapt to their environment. And the survival of species is assured.

Here, the type of ostriches that run slow probably fall prey to the jackals. To maintain survival, the ostriches reproduce and lay eggs. If out of almost a dozen eggs, one or two are left to hatch than the chances of their survival will greatly be affected if the hatching ostriches are of the slow-running type.

Therefore, natural selection may stay in favor of fast-running ostriches to hatch.

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3 years ago

The development of nuclear power has provided electricity for less money, but at a cost. What may be considered a "cost" of nucl

ivolga24 [154]

The answer is; D

Radioactive waste poses a serious challenge to the environment. Any leakage of the waste is risky because the radioactivity can flow up the food chain and it also takes time for it to decay and become less harmful. Therefore, its effect can be felt over many generations. Therefore, safe storage of radioactive waste is a challenge (and can be very expensive) and a deterrent for pursuing the potent energy source.

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3 years ago

How has shark skin been used to inspired materials that slide faster through the water?

sergey [27]

Answer:

Shark skin has been used by many cultures as sandpaper. It's kept shipmates safe in slippery-when-wet conditions. Swimsuits modeled on shark skin are said by Speedo to reduce drag by up to 4 percent. Now, research by two separate groups could lead to synthetic shark skin that would make ships and submarines faster and less expensive to operate.

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3 years ago

During which stage of development does a human learn self-care such a bathing, using the toilet, and brushing teeth?

Arte-miy333 [17]

Answer:

C. Early childhood

Explanation:

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2 years ago

what kingdom has some organisms that use sunlight to make food, while others consume other organisms as their food source

Rainbow [258]

Answer: Plant kingdom!

Explanation: Most plants use sunlight to make food with photosynthesis but others, like the Venus fly trap, consume other organisms. Good luck! :D

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2 years ago