Answer:
Whereas carbohydrates provide a readily available source of energy, lipids function primarily as an energy reserve. The amount of lipids stored as an energy reserve far exceeds the energy stored as glycogen since the human body is simply not capable of storing as much glycogen compared to lipids.
Explanation:
PRESS THE CROWN
Eukaryotic cells comprise everything a prokaryotic cell has
and more, signifying that these characteristics established over time. The
presence of chloroplasts and mitochondria, which have their own membranes and
DNA, signifies that these organelles derived from prokaryotes that were immersed
by a bigger cell.
<span />
If the cell membrane were not selectively permeable, then unwanted substances would transfer through instead of being blocked out. Think of it like this: you have a sifter with various sizes of spice in it. You only want the finer grains of spice in your food, so when you shake the sifter, the larger pieces of spice don't fit through the small holes that only allow fine grains. Then you are left with the small spices in your food and the large ones stuck in the sifter.
Hopefully this helps and I wasn't too confusing :)