HELP PLS PLS PLS PLS

1- The polar section of a phospholipid is the part with the phosphate group. This is sometimes called the polar head of the molecule.

2- The phosphate group is the negatively-charged polar head, which is hydrophilic. The fatty acid chains are the uncharged, nonpolar tails, which are hydrophobic.

Explanation:

answer: land bridge theory. land bridge theory held that shifting portions of dry land explained the finding of identical species on different continents. plate tectonic theory eventually eliminated the land bridge theory.

it's d - life cycles - apex