What can you conclude about the advantage of the cell membrane having hydrophobic ends in the phospholipid bilayer?

a. the cell requires the ability to digest and eliminate enzymes.
b. the cell requires a barrier between itself and its environment.
c. the cell requires a means to store starches and glucose.
d. the cell requires a structure for eliminating waste.

i think it is b but i want to make sure

On a floor there are several 1-4 mm elongated drops leading away from a body lying in a pool of blood. the the forward wall there is a sigzag pattern and on the walls to the right side there is a linear patter

This is a typical grassland food web. it is also a small picture of an important cycle on earth: the carbon cycle. describe how the carbon gets into this food web. a) bacteria and fungi, the decomposers, recycle carbon from dead organisms. b) carbon is found in the grass and is passed from one level to the next in this food web. eliminate c) all living things give off carbon dioxide as a by-product of respiration and it is released into the atmosphere. d) plants use carbon dioxide as a reactant in photosynthesis, to make usable chemical energy in the form of a sugar.

During convection, less dense fluid rises and denser fluid sinks.