Which of the following statements regarding the currently available fossil record is false?
A) The currently available fossil record shows that the earliest fossils of life are about 3.5 billion years old.
B) The currently available fossil record shows that younger strata were laid down on top of older strata.
C) The currently available fossil record documents gradual evolutionary changes that link one group of organisms to another.
D) The currently available fossil record shows that the first life-forms were eukaryotes.
Answer: D
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Fill in the blank with the appropriate word.
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Animals with chemical defenses are also typically:a
fast runners. b. aposematic. c. small in size. d. large in size. e. camouflaged.
Compare and contrast conventional and costly signals. Which statement is incorrect?
a. Both signals elicit costs during either production (honest signal) or use (dishonest signal). b. Both signals are energetically costly to produce. c. The meaning of conventional signals is not intrinsically connected with the structure. d. Not communicating at all may provide more fitness than communicating with a costly signal.