The gaseous plant hormone is ____
a. auxin
b. gibberellin
c. cytokinin
d. abscisic acid
e. ethylene
ANSWER: e
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Fly species W, found in a certain part of the island, produces fertile offspring with species Y. Species W does not produce fertile offspring with species X or Z
If no other species can hybridize, then which of the following statements about species W and Y are true? I) Species W and Y have genomes that are still similar enough for successful meiosis to occur in hybrid flies. II) Species W and Y have more genetic similarity with each other than either did with the other two species. III) Species W and Y may fuse into a single species if their hybrids remain fertile over the course of many generations. A) Only I is correct. B) Only II is correct. C) Only III is correct. D) I, II, and III are correct.
An offspring that is the result of asexual reproduction has genes that were duplicated during
a) mitosis in one parent b) mitosis in two parents c) meiosis in two parents d) meiosis in one parent
Which amino acid would Nirenberg and Leder have found when they used the triplet UAG?
A. proline B. isoleucine C. lysine D. threonine E. None of the answers are correct.
Which of the following organelle(s) has/have a genome separate from the genome in the cell nucleus?
A. mitochondria B. chloroplast C. nucleolus D. mitochondria and chloroplast E. mitochondria and nucleolus