For protection from the outside elements & harmful insects I would assume. Unless that's already obvious & they wanted a more in-depth answer.
Answer:
Most tissues of the body grow by increasing their cell number, but this growth ... photography of a live plant cell nucleus undergoing mitosis.
A germ-line mutation in one of the genes implicated in the cancer occurred in an ancestor.
hellosphere. This is not an actual part of the "spheres" on Earth
Hope this helps
Answer:
The most important abiotic factors include water, sunlight, oxygen, soil and temperature. Water (H2O) is a very important abiotic factor – it is often said that “water is life.” All living organisms need water.
