What is the immediate product of meiosis in plants?
a. diploids
b. gametes
c. spores
d. sporophytes
e. somatic cells
ANSWER: c
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Which of the following sugars is found in
RNA and NOT in DNA?
a. glucose b. deoxyribose c. deoxyribulose d. ribose e. ribulose
The end result of the process in Figure 20-1 is:
a. sympatric speciation.
b. allopolyploidy.
c. hybridization.
d. rapid speciation.
e. All responses apply
Explain the significance of what Loewi observed in his experiment with the two frog hearts.
A. It suggests that all vertebrate hearts receive both inhibitory and excitatory signals from different nerves. B. It showed that nerves have a direct electrical effect on heart muscle. C. It showed that neurons communicate with muscle by electrical signals. D. It suggests that a chemical substance released from the first heart, when added to the second heart, reproduced the effects of electrical stimulation.
Which of the following organisms produces the toxin associated with St. Anthony's Fire (ergotism)?
A. Aspergillus nidulans B. Stachybotrys chartarum C. Amanita phalloides D. Claviceps purpurea