The Pacinian corpuscle is used in detecting ____.
A. sound
B. hard pressure
C. chemicals
D. light touch
E. chemical differences
Answer: B
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Only 2.5% of the human genome actually codes for proteins. The other 97.5% includes:
A. noncoding RNA. B. repetitive DNA. C. introns. D. All of the answer options are correct. E. None of the answer options is correct.
A single large source of a pollutant is known as a(n) ____ source, while many small sources of pollution are known as ____ sources
a. point; nonpoint b. nonpoint; point c. illegal; legal d. municipal; community e. concentrated; disparate
Which is NOT part of the nitrogen cycle?
a. denitrification b. deammonification c. nitrogen fixation d. ammonification e. uptake by autotrophs
Cattle egrets follow African ungulates such as African buffalo around and catch insects that the buffalo flush out. Oxpeckers perch on the backs of buffalo and feed on ectoparasites that infest the buffalo. Which one of the following shows the ecological interaction that the buffalo has with each bird?
A. Cattle egret: commensalism; oxpecker: commensalism B. Cattle egret: competition; oxpecker: mutualism C. Cattle egret: mutualism; oxpecker: commensalism D. Cattle egret: commensalism; oxpecker: mutualism E. Cattle egret: mutualism; oxpecker: mutualism