Homo erectus and the modern humans differ in
A. social behavior.
B. living as tribes.
C. their brain size.
D. their upright posture.
E. opposable thumbs.
C. their brain size.
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Georges Cuvier and his followers developed the theory of ____, reasoning that each layer of fossils represented the
remains of organisms that had died as a result of dramatic shifts in ancient environments.
a. fossilization b. uniformitarianism
c. sedimentation d. catastrophism e. gradualism
The form of asexual reproduction used by a hydra is called __________. Fill in the blank(s) with the appropriate word(s)
Which of the following statements about a complete digestive system is false?
a. It is characteristic of flatworms. b. It is a tube with two openings. c. Its regions are specialized to perform specific functions. d. Food can be ingested while previously eaten food is being digested. e. Food enters the mouth and is eliminated through the anus
Why can flowers be brought "into bloom" out of season by changing the duration of light and darkness?
What will be an ideal response?