In the history of the earth, extinction is:
A) overall quite rare
B) always the result of environmental catastropes
C) unknown until the evolution of human beings
D) extremely common
Correct Answer:
Verified
Q12: Savannas are characterized by:
A) dwarf tree species
B)
Q13: Most trees follow which photosynthetic pathway:
A) C4
B)
Q14: Most grasses follow which photosynthetic pathway:
A) C4
B)
Q15: In the photosynthesis pathway employed by most
Q16: Evidence of the worldwide expansion of the
Q18: Human beings evolved from:
A) an ape species
Q19: The contraction of forest habitat at the
Q20: The characteristic possessed by our ancestors that
Q21: Bipedal primates considered to be in the
Q22: The oldest evidence for bipedal primates dates
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