Respond to the following statements in reference to the five stages or structures involved in the development of the human egg. Answers may be used more than once or not at all.
A. This diploid germ cell produces primary oocytes by mitosis.
B. Human females are born with about 2 million of these cells that entered meiosis but stopped in prophase I.
C. This cell becomes the mature egg only after fertilization in humans.
D. This cell is the first sex cell stage to be in the haploid state.
E. This cell contains a haploid set of chromosomes but will never be fertilized; often disintegrates and is reabsorbed in the body.
F.
A. Oogonium
B. Primary oocyte
C. Secondary oocyte
D. Secondary oocyte
E. Polar body
F. Corpus luteum
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The cytomegalovirus (CMV) produces cytopathic effects (CPE) in diploid fibroblast cells in an average of 7 days. The results are available within 16 hours using which type of assay?
a. Conventional cell culture b. Shell vial c. Paired sera d. Western blot
Which of the following contributes most to gene flow?
a. adaptation b. mutation c. migration d. environmental variance
A patient is exhibiting symptoms that include lethargy, weight gain, and abnormal blood levels of calcium. Where does the patient potentially have a tumor?
A) pancreas B) thyroid gland C) thymus D) hypothalamus
An inverted energy pyramid for an ecosystem, one where there are more consumers than producers at a given point in time, is possible if which of the following is true?
Select one: a. Producers are reproducing more slowly than consumers. b. There is intense sunlight for long periods of time, as in the tropics. c. Producers are reproducing much more rapidly than consumers. d. Decomposers are reproducing much more rapidly than consumers. e. Consumers are reproducing more rapidly than producers.