During which process does the shedding of the endometrium occur?
A) menstruation
B) intercourse
C) ovulation
D) fertilization
A
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Why are sex chromosome aneuploidies less detrimental than autosomal aneuploidies?
A. Sex chromosomes do not contain genes that are important for anything other than sex determination. B. In females, all but one X-chromosome is inactivated; in males, the Y chromosome contains very few genes, so extra or missing copies do not cause huge abnormalities. C. Gene expression of the sex chromosomes is not dosage-dependent as it is for the autosomes. D. Sex chromosomes are only found in gametes, they do not occur in diploid cells. E. All of these are TRUE.
The genus Desulfovibrio
A. uses sulfate as a terminal electron acceptor during anaerobic respiration. B. produces H2S. C. is a strict anaerobe. D. All of the choices are correct.
Which of the following is responsible for the actual invasion of the lining of the uterus?
a. trophoblast b. amnion c. inner cell mass d. blastocyst e. placenta
Which is true regarding release of the T4 bacteriophage?
a. T4 enzymes compromise the cell membrane and peptidoglycan, causing lysis of the host cell. b. Cro allows the expression of release proteins, leading to host-cell lysis. c. Newly assembled T4 phages are released via a secretion apparatus. d. T4 phages exit via budding, assembling an envelope from the cell membrane.