Which of the following statements is true regarding neurosecretory cells of the hypothalamus? Select all correct choices
A. They secrete releasing factors.
B. They secrete thyroid-stimulating hormone
(TSH).
C. Their cell bodies reside in the
hypothalamus.
D. Their cell bodies reside in the (posterior)
pituitary gland.
E. They do not produce hormones, as they
are neurons and not endocrine cells.
A,C
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The hemoglobin gene is the only gene that is under selection for resistance to malaria
A. true B. false
Statements 63–67 ask about membrane permeability. For each
one, select the best choice from the following five processes below. a. simple diffusion b. facilitated diffusion c. osmosis d. active transport e. endocytosis E 63. This process is used by white blood cells to ingest bacteria. E 64. This process specifically moves water molecules across a differentially permeable membrane. E 65. This process explains the movement of any kind of molecule from areas of higher concentration to areas of lower concentration. E 66. The method by which glucose crosses the plasma membrane. M 67. This process explains the movement of molecules against a concentration gradient.
A scientist collects grass clippings to find the source of an outbreak of tularemia is an example of working in the field of
A. epidemiology. B. food microbiology. C. biotechnology. D. agricultural microbiology. E. genetic engineering.
If species are competing for the same resource, natural selection will lead to ________.
A. polyploid individuals B. hybrids C. prezygotic isolating mechanisms D. character displacement