In Southern blotting DNA fragments are separated by _____, transferred to _____, and visualized by _____
1.size / DNA-binding membrane / ethidium bromide
2.charge / filters / colored dye
3.heating / agarose gel / fluorescence under UV light
4.size / DNA-binding membrane / hybridizing with radioactively labeled probes
4
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The nervous system controls the contraction of in the wall of the bronchioles, thereby adjusting airflow in response to metabolic demands.
A. autonomic; skeletal muscle B. autonomic; smooth muscle C. somatic; skeletal muscle D. somatic; smooth muscle E. autonomic; cartilage
What is the function of the myelin sheath in the nervous system?
What will be an ideal response?
In cladistic analysis, a researcher will group species based on similarities derived from common ancestry
a. true b. false
Which of Darwin's postulates about evolution by natural selection is most directly related to heritable variation?
A. Individuals that survive are not a random sample of the population. B. The individual organisms that make up a population vary in the traits they possess. C. An individual's phenotype can change in response to a challenge from the environment. D. In each generation, many more offspring are produced than can possibly survive.