Choloesterol is present in the membrane. It's role in the membrane is permeability reduction. Cholesteron is also used in corticosteroids synthesis(hormone secreted by the renal glands)
Answer:
overy
Explanation:
thr organ that reproductive cell in plants is overy
Answer:
The correct answer is A.
Explanation:
Diffusion is the net movement of a substance from a region of higher concentration to a region of lower concentration. The difference in concentration between two environments creates a concentration gradient which is what drives diffusion. Therefore, this movement does not require aid such as extra energy molecules for active transport or integral membrane proteins for directed movement, hence the answer is not B nor C. If the cell is in equilibrium with its environment, it means that the concentration of substances inside the cell is equal to the concentration outside the cell, and any movement that takes place will be random movement of substances across the plasma memberane. Movement in the cell will not cease as the cell is still active. Therefore, the answer cannot be D either.
<span>Animalia -</span><span> Mammals, amphibians, reptiles, birds, fish, mollusks, and insects
are all included in this kingdom.</span>
Answer: By studying the fossil record we can tell how long life has existed on Earth, and how different plants and animals are related to each other. Often we can work out how and where they lived, and use this information to find out about ancient environments. Fossils can tell us a lot about the past.
