Analogous structures form because they evolve as a response to similar environmental pressures.
a. Organisms that share a single ancestor
b. Species that remain in the same location over time
c. Species that evolved separately from their parents
d. Organisms that mutated to survive
a. Organisms that share a single ancestor
Organisms that share a single ancestor is a monophyletic group.
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A. Protons are too hydrophobic to pass through membranes. B. Protons are too large to pass through the membrane. C. There are no proteins in membranes to allow protons through. D. The positive charge on protons prevents them from passing through the hydrophobic interior of membranes.