In adult humans, most cancers are carcinomas or adenocarcinomas. These include cancers of the skin, lung, colon, breast, and prostate. Which of the four basic tissue types is involved?
Why do you think this is so?
Epithelium gives rise to most cancers. This is probably because epithelial cells divide more, leading to more opportunity for damage to growth control mechanisms, and because epithelia are more often in contact with environmental insults such as ultraviolet radiation and carcinogens.
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Which enzyme class splits a chemical bond in the absence of water?
A. Lyase B. Hydrolase C. Ligase D. Dehydrogenase E. Oxidoreductase
CO2 is a small, non-polar molecule. It will cross the cell membrane by
A. diffusion through a channel. B. active transport. C. diffusion using a pump. D. simple diffusion.
The maximum amount of work done by the contracting muscle was observed when the muscle was lifting...
What will be an ideal response?
Heat always moves down a thermal gradient from a(n) __________ to a(n) __________ region
Fill in the blank(s) with correct word