Figure 15.7
The accompanying figure illustrates ____.
A. the production of recombinant DNA
B. probing for transferred genes
C. DNA fingerprinting
D. DNA sequencing
E. producing radioactive probes
Answer: D
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Citing the dangers of rabies-transmission by local populations of bats, a farming community begins a campaign to trap and kill the winged mammals on a large scale. Shortly thereafter, cornfields begin showing substantial and increasing damage to crops. What is the most likely explanation?
a. Installing bat traps caused disruptions to the local water table. b. Infrasonic cries of trapped bats cause corn plants to suffer stress reactions. c. Pests feeding on corn have multiplied without natural predators. d. Bats feed on damaged corn, leaving more room for healthy plants.
In addition to the deposit feeding brittle stars pictured, what other type of organism is abundant in this photograph?
1.sea cucumbers
2.urchins
3.bivalves
4.sea stars
Which one of the following types of neurotransmitter functions as an inhibitory agent, typically suppressing the sensation of pain?
A) endorphins B) acetylcholine C) epinephrine D) serotonin E) somatostatin
What is the fundamental purpose of staining in light microscopy?
a. To kill the specimen b. To make the specimen appear larger in the microscope c. To see the specimen without the aid of a microscope d. To increase the contrast and visibility of the specimen