Which of these is true for most water-soluble
hormones?
a. They must be transported by specific
carriers in the blood.
b. They have no trouble entering their target
cells.
c. They find and react with surface receptor
molecules.
d. They never elicit the production of a second
messenger.
e. They trigger gene transcription.
C
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Which of the following is a method of introducing genes into plants?
a. using Ti plasmid and Rhizobium radiobacter bacteria to infect cells with the new genes b. creating transgenic plant cells in cultures to produce a callus which then grows into a transgenic plant c. crossing plants with desirable traits with other plants with the same trait for multiple generations d. both using Ti plasmid and Rhizobium radiobacter bacteria to infect cells AND creating transgenic plant cells to produce a callus that grows into a transgenic plant. e. both using Ti plasmid and Rhizobium radiobacter bacteria to infect cells AND crossing plants with desirable traits with other plants with the same trait for multiple generations.
A collection of cloned DNA fragments representing an organism's entire genome is called a ________.
A. complementary DNA collection B. transgenic assembly C. genomic library D. clonal anthology
Explain the four features necessary to classify an organism as a vertebrate.
What will be an ideal response?
A founder event changes allele frequencies because:
a. only a subset of genes in the original population are observed in the founder population. b. of random sampling of alleles from the original population. c. of the coalescent process. d. A and B. e. All of the above.