The key evolutionary step that allowed one cell to engulf another was the
A) absorption of mitochondria.
B) retention of chloroplasts.
C) development of a cytoskeleton.
D) evolution of photosynthesis.
Correct Answer:
Verified
Q14: Proterozoic "elephant skin" bedding surfaces indicates
A) ripples
Q15: The bilaterally symmetrical soft-bodied Ediacaran fossil Kimberella
Q16: In the Wopmay orogenic sequence of sediments,
Q17: It is likely that the intracellular body
Q18: The main exposed part of the North
Q20: The Neoproterozoic radiation of large, conspicuous animals
Q21: The Proterozoic orogeny that built mountains along
Q22: Africa was assembled in the Pan-African orogeny
Q23: _ is a continental craton that was
Q24: The 1.85-billion-year-old Sudbury impact crater contains
A) spherical,
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