Four of the following statements are true. Which one is not?
A. Amniotes are the predominant vertebrates on land.
B. Tetrapod vertebrates have four bony limbs.
C. All chordate embryos have a notochord, a dorsal tubular nerve cord.
D. Lancelets and tunicates are the two groups of invertebrate chordates.
E. The backbone and the other skeletal elements are components of the vertebrate exoskeleton.
Answer: E
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Which of the following statements about the bicarbonate-carbonic acid buffer system is false? a. Rapid, deep breathing makes the pH of the blood rise
b. Bicarbonate can bind to excess hydrogen ions, preventing blood pH from becoming too acidic. c. None of the choices. d. Carbon dioxide can dissolve in the blood as carbonic acid.
The morphological approach to speciation is prone to misinterpretation. Which of the following is not
an example?
a. male birds with strikingly different plumage than females b. a chihuahua and a great dane that do not look alike c. snails that resemble each other, but cannot mate d. snails of quite varied appearance that can all interbreed e. snails of quite similar appearance that are shown to be different species via reproductive isolation
Why would the evolution of a better eye be a disadvantage for a mole?
What will be an ideal response?
Epigenetic effects cause _____ behavior without altering _____
a. instinctive; oxytocin level b. instinctive; the genome c. conditioned; the genome d. heritable changes in; DNA sequence e. temporary changes in; RNA sequence