Evidence Suggests That Complex Multicellular, Water-Dwelling Organisms First Appeared on Earth
Evidence suggests that complex multicellular, water-dwelling organisms first appeared on earth
A) in the early 1920s.
B) 600 million years ago.
C) 20 million years ago.
D) 4 million years ago.
E) 2 million years ago.
Correct Answer:
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Q22: The first hominins are thought to have
Q22: Lizards,snakes,and turtles are
A) reptiles.
B) amphibians.
C) vertebrates.
D) both
Q24: Reptiles were the first animals to
A) have
Q27: Animals with dorsal nerve cords are called
A)
Q30: Prosimians, hominins, and apes are all
A) old-world
Q32: Australopithecines, the first hominins, are thought to
Q36: The conspecific of a vole is a
A)
Q36: The first animals to venture out of
Q37: Unlike old-world monkeys, apes
A) do not have
Q40: Frogs,toads,and salamanders are
A) vertebrates.
B) chordates.
C) amphibians.
D) all
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