Lipid polymers are often created by numerous non-polar fatty acid chains with a polar head lined up. Which is the best explanation of the lipid structure. the polar head only lines up and touches the non-polar tail

the polar heads line up touching and the non-polar tails line up

there is no formation of a polymer lipid

the polar heads repel one another

Which of the following is an example of competition a. the leaves of a tree prevent a small shrub from getting sunlight. three species of birds feed a different heights in the same tree. b. three species of birds feed at different heights in the same tree c. zebra and giraffe’s feed on different grassland plants d. cats living in two different homes eat the same brand of cat food.