Answer the question using the accompanying figure. In the figure, letter B represents a ____ taxon, which includes
____.
a. monophyletic; an ancestral species and all of its descendants
b. polyphyletic; species from different evolutionary lineages
c. polyphyletic; an ancestral species and all of its descendants
d. paraphyletic; species from different evolutionary lineages
e. paraphyletic; an ancestral species and only some of its descendants
ANSWER: b
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Which of these conditions should completely prevent the occurrence of evolution in a population over time?
a. All phenotypic variation between individuals is due only to environmental factors b. the population lives in a habitat where there are no competing species present c. the population size is large d. The environment is changing at a relatively slow rate
The enzymes for cellular respiration in eukaryotic organisms are located within the mitochondria. In prokaryotic organisms, these enzymes are attached to the
A. nuclear membrane. B. ribosomes. C. circular DNA. D. cell membrane. E. cell wall.
What are the two ways in which a complete viral particle (protein surrounding nucleic acid) may be assembled, and what types of viruses use each of these two ways?
What will be an ideal response?
Combinatorial control of gene expression __________________________
(a) involves every gene using a different combination of transcriptional regulators for its proper expression. (b) involves groups of transcriptional regulators working together to determine the expression of a gene. (c) involves only the use of gene activators used together to regulate genes appropriately. (d) is seen only when genes are arranged in operons.