My guess is that fat-soluble toxins that may occur in freshwater ecosystems would most affect apex species in these ecosystems. This is because fat-soluble toxins are stored in the fat reserves of animals, and then bioaccumulate up the food chain. So in this case, most of the toxin is not secreted, but stored within the food chain, and bioaccumulates, with the concentration becoming higher the further up the food chain.
Answer:
D. Sunlight
Explanation:
Since photosynthesis provides the energy the plant needs for growth, lack of light will stunt the plant's growth.
A cell conducts endocytosis by pinocytosis and phagocytosis.
Answer:
If a checkpoint fails or if a cell suffers physical damage to chromosomes during cell division, or if it suffers a debilitating somatic mutation in a prior S phase, it may selfdestruct in response to a consequent biochemical anomaly.
Answer:
The correct answer is two layers of phospholipid with their polar hydrophilic heads facing away from each other.
Explanation:
The plasma membrane is composed of phospholipid bilayer in which the protein molecules are embedded .Each phospholipid of the phospholipid bilayer contain a glycerol head group that are arranged in the extracellular region away from each other.
whereas the fatty acid chain of the the phospholipid molecules of both the layer faces each other in the hydrophobic region of the plasma membrane.
