What determines the specific segment of DNA that is amplified by PCR?
A) the plasmid used
B) the type of DNA polymerase
C) the use of DNA ligase
D) the source of nucleotides
E) the primers used
E
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Which of the following statements is not true about phloem transport of sugars?
A. Active transporters move the sucrose into the phloem. B. Removing sugars from phloem increases turgor pressure at the sink. C. Increased sugar concentration causes water to flow into the sieve tube. D. Sugars are transported out of the phloem at the sink. E. Loading of sugars at the source is powered by ATP.
How is the Ti plasmid used to create transgenic plants?
a. The Ti plasmid allows all of the plant cells to host the bacteria Rhizobium radiobacter and thus express the foreign gene that was inserted into the bacterial chromosome. b. The Ti plasmid inserts the foreign gene directly into the plant's nuclear DNA. c. Once the Rhizobium radiobacter forms a tumor in the plant, the tumor cells can take up the foreign DNA and incorporate it into their chromosomes. d. The Ti plasmid inserts the foreign DNA into the DNA in the chloroplast. e. The Ti plasmid inserts the foreign DNA into the plant's mitochondrial DNA.
What reproductive characteristics allowed the formation of an egg with a leathery shell?
What will be an ideal response?
Clusters of nerve cell bodies that function as a local
integrating center are a. nerve cords. b. ganglia. c. a plexus. d. notochords. e. nerves.