Which characteristic is typical of a cancer cell but not of a normal cell?
A) Cell division is inhibited when the cell contacts neighboring cells.
B) The cell cycle lacks S phase.
C) The cell has the ability to invade surrounding tissue.
D) Cell death occurs after a limited number of divisions.
C) The cell has the ability to invade surrounding tissue.
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What is the best way to minimize our individual impact upon the environment? a. Decrease energy consumption
b. Compost all organic wastes from our households. c. Buy reusable products. d. Recycle plastics. e. Buy durable goods that will last a long time.
Frigatebirds have been observed to pirate food by:
a. perching on feeding pelicans and then stealing fish. b. beating and jostling boobies in flight, forcing them to regurgitate their food - then seizing it. c. preying on other birds. d. both a and b. e. both b and c.
After DNA replication, each chromosome contains two sister _____
a. chromatids b. chromatins c. chromosomes d. centromeres e. centrioles
Maria is pregnant and a week past her due date, and her doctor decides to induce labor. Her physician will use pitocin, which is a synthetic form of which natural hormone?
A) progesterone B) oxytocin C) estrogen D) prolactin