Research by Christopher Cullis has shown that ____
a. the genome size of plants varies little between species
b. the genome size of individual plants of the same species is constant
c. a plant’s environment can act as a selective agent to establish advantageous variants, but these variants cannot
be transmitted to the next generation
d. a plant’s environment can act as a selective agent to establish advantageous variants, and these variants can be
transmitted to the next generation
e. the genome size of plants is related to plant size
ANSWER: d
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What is the first step in the process of transferring the blight-resistant gene from one organism
to another?
a. Identify the gene that you need. b. Insert the gene into a plasmid. c. Transcribe and translate the gene. d. Decode the DNA.
Nitric oxide (NO) serves as a local signal for vasodilation because it ____
a. is broken down quickly b. dissipates quickly c. recycles rapidly in cells d. counteracts the action of oxygen e. blocks adrenergic receptors
If similarities between two structures in different organisms reflect common ancestry, these structures are
A. analogous. B. heterologous. C. vestigial. D. homologous. E. homeotic.
The core of every virus particle always contains
A. DNA. B. capsomers. C. DNA and RNA. D. enzymes. E. either DNA or RNA.