According to the biological species concept, two groups of organisms that are unable to form fertile, viable hybrids are considered to be different
A. species.
B. hybrids.
C. kingdoms.
D. cohabitants.
E. races.
Answer: A
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The evolution of photosynthesis involved __________
A. convergent evolution B. endosymbiosis C. horizontal gene transfer D. convergent evolution and endosymbiosis E. horizontal gene transfer and endosymbiosis
By definition, if the DNA of a cell undergoes a spontaneous mutation, is was NOT due to
A. exposure to radiation. B. insertion of transposons. C. errors in DNA replication. D. spontaneous depurination of nucleotides.
Saltwort (Batis) maintains osmotic balance with
a. succulent stems. b. salt glands. c. salt leaves. d. they cannot maintain osmotic balance; they are osmoconformers. e. salt filtration mechanisms in the roots.
Glycogen is a polysaccharide used for energy
storage by a. animals. b. plants. c. protistans. d. bacteria. e. fungi.