On a hike through the forest, you notice a population of 100 flowering plants that all look identical (phenotypic clones), and they span an area of approximately 100 square meters
You take some representatives from one corner of their distribution back to the lab, sequence
their DNA, and conclude that they are also genetic clones.
t or f: This population can evolve.
t or f: This population can only evolve through genetic drift.
t or f: This population can only evolve through natural selection.
What will be an ideal response?
t or f: This population can evolve.
t or f: This population can only evolve through genetic drift.
t or f: This population can only evolve through natural selection.
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Four of the five actions listed below are responses to
cold temperatures. Select the exception. a. vasoconstriction of peripheral blood vessels b. uncontrolled muscular contraction c. thermoreceptors send messages to the hypothalamus d. enhanced secretion of sweat glands e. increased metabolic reactions
A human male who undergoes a sex-change operation will be chromosomally
A) XX. B) XY. C) XXY. D) XYY. E) YYY.
Chimpanzees are considered to be our closest extant relative because
A. they have flat, spreading noses. B. their upper/lower limbs equally account for bearing the body weight. C. they are a highly social species. D. they have prehensile tails. E. their genome is 99% identical to the human genome.
DNA replication proceeds ________
A) semiconservatively B) unidirectionally C) dispersively D) discontinuously E) progressively