What kind of movement occurs between bones in planar joints?
a. extension
b. rotation
c. gliding
d. abduction
c. gliding
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Adaptations to terrestrial environments evolved independently in arthropods, mollusks, nematodes, and annelids. What logical conclusion would you make from this statement?
A) All these groups have a coelom. B) The common ancestor of all these groups was probably aquatic. C) All these groups have the same type of body plan. D) All these groups lost their coelom after moving to land.
A liger is a result from a male lion and a female tiger. Male ligers are usually sterile. This is an example of
A. a prezygotic mechanism. B. hybrid inviability. C. hybrid sterility. D. hybrid breakdown. E. a prezygotic mechanism and hybrid sterility are correct.
A dance that recruits other bees into foraging
directly toward the sun is indicated by a. A. b. B. c. C. d. D. e. E.
The Punnett square illustration below shows that
theoretically a. half of human sperm carry a Y chromosome. b. half of human zygotes are XY. c. all zygotes carry an X chromosome. d. gender depends upon which type of sperm fertilizes the egg. e. all of these are true.