A tidal wave wipes out the entire population of mice living on an island. This is an example of
A) Type III survivorship.
B) a density-dependent effect.
C) the effects of abiotic factors.
D) the interaction between density-dependent and abiotic factors.
Answer: C
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A young woman develops a tumor in her pituitary gland. Which symptoms might the doctor use to diagnose this
tumor?
a. inability to regulate temperature b. inability to formulate new memories c. inability to recognize faces d. increase in anger e. decrease in sensation in feet
Chromosome condensation indicates a cell has entered
A) prophase. B) prometaphase. C) metaphase. D) anaphase. E) telophase.
Certain properties of water—its cohesion, surface tension, and resistance to temperature change—are all:
A. a function of the partial negative charge on the H atoms of a water molecule. B. a function of the hydrogen bonds within a water molecule. C. a function of the hydrogen bonds between water molecules. D. a function of the non-polar covalent bonds between the H and O atoms within a water molecule.
A ____ is required to transfer genes from one organism to another
a. vector b. reverse transcriptase c. transport molecule d. genetic probe e. PCR device