Semen contains all of the following EXCEPT
a. about 5 percent sperm by volume.
b. a fast-acting clotting enzyme.
c. a slow-acting enzyme that breaks down the semen clot.
d. a substance that decreases the pH in the female reproductive tract.
e. a substance that triggers contraction of muscles in the female reproductive tract.
D
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Cell division in unicellular organisms results in ____ individuals.
a. 4 b. 1 c. 8 d. 2
A gel electrophoresis is performed, but when the gel imager is used, no bands appear. The researcher might have forgotten to:
_____ add electric current. _____ add antibody. _____ ligate the DNA fragments together. _____ include DNA dye. _____ include an RNA probe. Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? · What key words does the question contain and what do they mean? Gather Content · What do you already know about gel electrophoresis? Consider Possibilities · Consider the different answer options. Which can you rule out? Choose Answer · Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer? Reflect on Process · Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
Chromatids are
a. attached at the centriole. b. a pair of chromosomes, one from the mother and one from the father. c. attached to the nuclear envelope. d. identical before and after crossing over occurs. e. identical until crossing over occurs.
Functions of joints
What will be an ideal response?