When describing phylogenetic trees, each branching point is called a
a. clade d. lineage
b. node e. split
c. point
B
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Plant hormones bind specific cellular receptor molecules that trigger gene expression responses. Which statement is correct concerning these responses?
A. Only cells lacking receptors can bind hormones. B. Only cells in the meristem can respond. C. Only cells that express the appropriate receptors can bind hormones. D. Only cells that have been previously activated can bind hormones. E. None of these choices is correct.
The molecular fragment represented in Figure 3-3 is:
a. ATP.
b. RNA.
c. a protein.
d. a nucleotide.
e. a polysaccharide
The majority of deaths due to smoking result from cardiovascular disease, not lung cancer or other lung diseases
Indicate whether the statement is true or false
Which metabolic process is most closely associated with intracellular membranes?
A) substrate-level phosphorylation B) oxidative phosphorylation C) glycolysis D) the citric acid cycle E) alcohol fermentation