Which structure forms spores through the process of meiosis?
a. Sperm
b. Gametophyte
c. Sporophyte
d. Spermatocyte
e. Zygote
c
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Organisms that live under similar environmental conditions and location, and interact directly or indirectly are part of the same:
a. ecosystem. b. biosystem. c. abiotic habitat. d. biotic habitat. e. population.
Which of the following statements about aromatic amino acids is correct?
A) All are strongly hydrophilic. B) Histidine's ring structure results in its being categorized as aromatic or basic, depending on pH. C) On a molar basis, tryptophan absorbs more ultraviolet light than tyrosine. D) The major contribution to the characteristic absorption of light at 280 nm by proteins is the phenylalanine R group. E) The presence of a ring structure in its R group determines whether or not an amino acid is aromatic.
The sea heats and cools
A. three times a day. B. more quickly than the land and more slowly than the land. C. more quickly than the land. D. more slowly than the land. E. at the same rate as the land.
A(n) ____ includes the entire genome.
A. cDNA library B. transcribed library C. genomic library D. RNA library E. plasmid library