Transport carrier proteins.
Answer:
A ambulocetus is a walking whale and it is about 11-12 feet long also they had strong limbs.
Explanation:
Answer:
This is because fluids have a polar nature, so they couldn´t cross the lipidic bilayer that constitutes the plasma membrane
Explanation:
Plasma membranes are contituted by lipid bilayers. These kind of compounds are hidrophobic (they reject water) and don´t permit the freely passage of hidriphilic molecules that can disolve in water, constituing fluids. Because of that cells developed transport mechanism like endocytosis.
D Would Be The Best Choice
The tRNA molecule determines the type of amino acid!
