About 530 million years ago, what adaptation evolved to make fish the dominant predators of the sea?
A) Scales
B) Sensory organs
C) Internal skeleton
D) Jaws
E) Fins
Correct Answer:
Verified
Q21: The organisms originally responsible for putting oxygen
Q22: The earliest photosynthetic organisms
A) probably did not
Q23: The earliest multicellular animals in the fossil
Q24: Exoskeletons provided an evolutionary advantage to organisms
Q25: Multicellularity enables organisms to overcome cellular limits
Q27: To be classified as a eukaryote, an
Q28: Probably the greatest advantage for the original
Q29: Modern invertebrates first appear in the fossil
Q30: The oxygen that arose in early Earth's
Q31: The earliest fossil organisms resemble modern
A) green
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