A stretch receptor is classified as a ____.
A. chemoreceptor
B. mechanoreceptor
C. photoreceptor
D. thermoreceptor
E. nociceptor
Answer: B
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This molecule catalyzes covalent bond formation between fragments of DNA.
A. helicase B. ligase C. polymerase D. primase E. nuclease
Glycerol forms the backbone of
a. triglycerides. b. polysaccharides and nucleic acids. c. nucleic acids. d. polypeptides. e. triglycerides and phospholipids.
The term that describes a tissue lacking oxygen is ____
a. hypoxic b. hyperemia c. hyperbaric d. hypercapnia e. hyperventilate
In the accompanying figure, the gull has the highest concentration of DDT because it is:
a. a more complex organism. b. an older organism. c. at the bottom of the food chain. d. at the top of the food chain. e. homoeothermic (warm-blooded).