It is advantageous for animals that migrate to store energy in the form of lipids rather than carbohydrates. this is because a) lipids do not form polymers b)lipids are more dense than carbohydrates c)carbohydrates do not supply energy cells d)lipids weigh less and store more energy(gram for gram) than carbohydrates

Johnny rode his bike to a friend's house 4 blocks down the street in his neighborhood. he immediately rode back home once he realized his friend was not able to play. what was his displacement for the total bike ride? how did you determine this? what could we use as a reference point to determine he was in motion during his bike ride? why can you use it as a reference point

The nervous system interacts with the endocrine system by a. using hormones as connections b. sending nerve impulses directly to glands c. using neuroendocrine cells as connections d. sending neurotransmitters directly to neurons

How can you tell the difference between rough er from smooth er?