The "pill" works primarily by
a. blocking sperm from entering the uterus.
b. causing spontaneous abortions.
c. inhibiting the release of FSH and LH.
d. preventing implantation of the embryo.
e. stimulating the release of GnRH.
C
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Marceau is studying small single-celled organisms that contain phospholipid membranes. These organisms can be broadly classified into the domain:
A. Bacteria B. Animalia C. Fungi D. Protista
How long does it take to proceed from prophase I to metaphase I in oogenesis?
A. There is a pause for about a month. B. There is a pause for a day. C. There is usually a pause of about 1 hour. D. It varies, but on the order of years. E. One follows directly after the other.
Induced pluripotent stem cells (iPS cells) are produced by _____
a. transferring a vitamin A gene into rice plants b. reprogramming adult cells by transferring certain master control genes into the cells’ nuclei c. mutating certain genes in human blastocysts d. harvesting multipotent stem cells from umbilical cord blood e. harvesting enzymes from cadavers, and then using the enzymes to reprogram adult cells
To provide motility, prokaryotic flagella whip back and forth while eukaryotic flagella rotate.
Answer the following statement true (T) or false (F)