What happens to the salinity of the ocean in areas where freezing occurs?
a. Salinity is maintained at a normal level
b. Salinity decreases.
c. Salinity creates a mixed layer with the ice.
d. Salinity increases.
d
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Sexual fusion brings two haploid cells together to produce a:
A. polyploid cell. B. diploid cell. C. haploid cell. D. None of these choices are correct.
A physician is attempting new therapies for HIV patients who are suffering from an impaired immune response. He decides to try using a recombinant form of colony-stimulating factor cytokine (CSF). Why?
A. CSF is a strong inducer of antiviral activities in our cells, and may help our immune system fight off the effects of HIV for a longer period of time. B. CSF will hyperstimulate the activities of the macrophages, leading to ingestion and destruction of HIV-infected cells. C. CSF will help to stimulate the production of new lymphocytes-the very cells that are infected and depleted during an HIV infection. This may help to keep the patients' immune responses "normal" for a longer period of time before they succumb to full-blown AIDS. D. CSF will drive up the production of lactoferrin, a strong antiviral compound produced in our mucus membrane secretions.
Which stage comes directly after interphase?
A. G1 B. cytokinesis C. S D. mitosis E. G2
The cystic duct and the hepatic duct join to form the ___________ duct before entering the duodenum. common
Fill in the blank(s) with the appropriate word(s).