Fill in the blank and highlight the correct answers in the statement below: The main molecule that makes up our cell membranes is . Its head is (hydrophilic/hydrophobic) and its tail is (hydrophilic/hydrophobic)

Cell specialization occurs by the process ofa. reproductionb. differentiationc. maturationd. growth

The circles, or orbits, for electrons are called energy levels. each level can hold only a certain number of electrons. add electrons to each level until you can't add any more. how many electrons can each level hold?

What pattern of migration do whales follow?