A bacterial cell must have ___________ in order to transfer portions of its chromosome to another cell.
A. an F factor
B. a high frequency of combination plasmid
C. a recombination factor
D. growth enhancement genes
E. all of these components
A. an F factor
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Ribosome movement along the mRNA is called
A. transcription. B. initiation. C. replication. D. translocation. E. activation.
Which component of a nerve cell provides electrical insulation for signals that are travelling along the axon?
a. astrocytes b. dendrites c. oligodendrocyte d. soma
Plants could readily develop seasonal responses for flowering based on temperature changes but have "elected" through evolution to manage their rhythms based on a comparison of daylight and darkness. Why has the day-night ratio system been selected?
A. Temperatures fluctuate widely across seasons and from year to year, but photoperiod comparisons are a more reliable indicator of season. B. Temperature has no effect upon plant biochemistry. C. Temperature is a gradation but day/night is all-or-nothing. D. A plant's nervous system is tuned to light stimuli and not to temperature stimuli.
Species that are introduced to new habitats, such as islands, often exhibit very high growth rates, but then growth rates level off. Explain this phenomenon, and describe the different patterns of growth
What will be an ideal response?