In the figure above, the shrublike or treelike species are circled in black. Looking at the figure above, which is the correct conclusion?
a. For the herbaceous species, the branch lengths tend to be shorter and the rates of sequence change more slowly.
b. For the herbaceous species, the branch lengths tend to be longer and the rates of sequence change more slowly.
c. For the herbaceous species, the branch lengths tend to be longer and the rates of sequence change faster.
d. For the herbaceous species, the branch lengths tend to be shorter and the rates of sequence change faster.
C
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Overall, water movement from the soil, through plant tissues, and finally to the atmosphere through transpiration, is driven by a gradient of
A) water potential. B) osmotic pressure. C) water temperature. D) specific leaf area.
Feedback inhibition of the first enzyme of a pathway by the end product of the pathway is an exampleof:a
translational control. b. posttranslational control. c. transcriptional control. d. inhibiting control. e. repression.
A technique used to identify species by matching up sequence differences in a standard region of the genome is called
A. mutation counting. B. genome sequencing. C. DNA barcoding. D. nucleotide matching. E. PCR
At one time the uncoupler 2,4-dinitrophenol was used as a weight reducing drug. Its side-effects, including death, resulted in its discontinued use. How could this drug cause weight loss?
A) The uncoupler allows the oxidation of fats from adipose tissue without the production of ATP. This allows the oxidation to proceed continuously and use up the fats. B) The uncoupler causes ATP to be produced at a much higher rate than normal and this causes weight loss. C) The uncoupler inhibits the transport of pyruvate into the matrix of the mitochondria. Fats are then degraded to glycerol and subsequently to pyruvate to provide the necessary energy, thereby depleting fat stores. D) The uncoupler is an allosteric activator of ATP synthase. This increases the rate of translocation of H+ and the oxidation of fuels, including fats.