Answer:
The hydrophilic part of the cell membrane is A, the phosphate head.
Charged molecules, such as K+ or Ca++ are unable to pass through the lipid bilayer because of their charge and must use a membrane protein to cross the cell membrane.
C, the lipid tails, are hydrophobic and repel water.
Phytoplanktons are also called microalgae. They are the foundation of the aquatic food web and the primary producers. They feed everything from microscopic to multi-ton whales. Thus, the answer to the question above is letter B. Provide basis of food chains.
Answer:
Fleeing crop failure, land and job shortages, rising taxes, and famine,are reasons people left their home counties. Many came to the U. S. because it was perceived as the land of economic opportunity.
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I think c is the answer not sure though
Maybe protein not too sure
