Which of the following lists is the correct
proposed sequence in the evolution of plants?
a. angiosperms >>> bryophytes >>> seedless
vascular plants >>> gymnosperms
b. bryophytes >>> seedless vascular plants
>>> gymnosperms >>> angiosperms
c. gymnosperms >>> angiosperms >>>
bryophytes >>> seedless vascular plants
d. seedless vascular plants >>> gymnosperms
>>> bryophytes >>> angiosperms
e. gymnosperms >>> bryophytes >>>
angiosperms >>> seedless vascular plants
B
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Which avenue of research is least likely to reveal whether asexual organisms form species?
a. analyzing whether a cluster of bacteria constitutes a species b. exploring various niches in which different populations reside c. looking into previously undiscovered types of bacteria d. performing genomic research e. hybridizing polyploid plants
A mutation in the promotor region of a gene can result in cancer. Which of these scenarios results in cancer?
a. The mutation is in the promoter region for an enzyme that metabolizes starch, such as amylase. Starch digestion is disrupted. b. The mutation is in the promoter region for a protein that controls rebuilding of the telomeres. As a result, these cells die prematurely. c. The mutation is in the promoter region for a protein that controls a key gate-keeper in the cell cycle. Without the gate-keeper, the cell blows through that checkpoint and continues with growth, unchecked. d. The mutation is in the promoter region for a calcium channel in the cell membrane of bone cells. The result of the mutation is a buildup of excess calcium in the extracellular space.
Animals that possess homologous structures probably _____.
A) are headed for extinction B) have a common ancestor C) have increased genetic diversity D) by chance had similar mutations in the past E) are not related
Under favorable conditions, during which phase of meiosis will the chromosomes appear as packets of four chromatids?
A) Anaphase II B) Anaphase I C) Metaphase II D) Prophase I E) Telophase II