A population that is divided into several local populations among which individuals occasionally disperse (emigrate
and immigrate) is known as a:
a. metapopulation.
b. life table.
c. survivorship curve.
d. source population.
e. sink population.
a
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In an experiment studying predator and prey relationships, a scientist offers a naïve toad a bumblebee as food. The bee stings the toad when the toad tries to catch and eat the bee. Subsequent feeding trials with the toad reveal that the toad avoids feeding on bumblebees. This is a demonstration of
A. non-associative learning on the toad's part. B. associative learning on the toad's part. C. ultimate learning on the toad's part. D. proximate learning on the toad's part. E. sign stimulus learning on the toad's part.
The somatosensory cortex _____
a. maps the distribution of somatic receptors on the body b. consists of gray matter c. involves only the spinal cord d. responds to all signals equally e. is not responsive to mechanoreceptors
Which of the following does NOT cause cancer?
A. Too much cell division B. Viruses C. Inherited genes D. Gene mutations E. All of the above cause cancer
Which of the following is present during meiosis but not mitosis?
A) a chromatid B) a centromere C) a spindle D) a tetrad E) sister chromatids