The cell wall is a rigid organelle composed of cellulose and lying just outside the cell membrane. The cell wall gives the plant cell it's box-like shape. it also protects the cell. The cell wall contains pores which allow materials to pass to and from the cell membrane.
Answer:
<h3>
The Prokaryotic Cell</h3>
Prokaryotes are unicellular organisms that lack organelles or other internal membrane-bound structures. Therefore, they do not have a nucleus, but, instead, generally have a single chromosome: a piece of circular, double-stranded DNA located in an area of the cell called the nucleoid.
Answer:
variation in skin color.
Explanation:
The human skin color is determined genetically depending on the amount of melanin. However pigmentation can occur as a results of exposure to uv rays that causes induced pigmentation.
The sun emits two types of ultra violet rays which can reach can reach the skin namely the uva and uvb. Both type of rays can damage the skin if unprotected. Due to this there was evolution against the damaging rays. More melanin that provides a natural sunscreen to the people leaving in the tropic environment.
tan coloring to blend in with the surroundings
Explanation:
The tan coloring helps ground squirrels adapt properly to African savannas.
African Savannah is a large expanse of grassland with very short trees. The bulk of Savannah is predominantly dominated by grass.
- Ground squirrels have a fascinating tan coloring of their hair like rodents in this biome.
- The color is the color of the earth.
- Through this it can easily blend with the ground and camouflage to escape their preys.
- Sharp claws are useless because it is a grassland.
Learn more:
Adaptation brainly.com/question/3027401
#learnwithBrainly
