Pain receptors are classified as ____
a. Pacinian corpuscle
b. free nerve endings
c. muscle spindle
d. Merkel’s discs
e. Meissner’s corpuscle
ANSWER: b
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If you were given the task of choosing a biological control agent for a reed from eastern China that has become invasive in the southeastern U.S., what do you think would be the best choice? Consider both the effectiveness and the safety of the agent you be releasing.
A. A generalist beetle, native to the U.S., that can consume massive quantities of the reed in a few weeks. B. A nematode, native to eastern China, that specializes on the reed but can take up to two years to kill a plant. C. A caterpillar, native to the U.S., that normally eats close relatives of the weed, but has been found in lab trials to perform better on the Chinese reed. D. A fungal pathogen from eastern China that specializes on the reed and can kill a plant in a few months.
It’s almost the end of the semester and earlier this afternoon, you remembered that you have a research paper, worth a full quarter of your grade, due at midnight tonight. Fortunately for you, you’ve already done the required research, but you still have thirty pages to type before Cinderella gets stuck with a pumpkin and you get stuck with an F—no pressure! After several hours of fast and furious typing, it looks like you’re going to make your deadline after all, but maybe you’re pounding on those keys a little too hard. Oh no! It looks like you’ve just dislocated your index finger between the proximal phalange and metacarpal. What type of joint will the EMTs be resetting while you try to type one-handed?
a. saddle b. pivot c. condyloid d. ball-and-socket
How do protostomes differ from deuterostomes?
a. Protostomes are diploblastic. b. Protostomes have radial symmetry. c. Protostomes undergo spiral cleavage during development. d. The first opening that develops in protostomes is the anus. e. Protostomes undergo indeterminate cleavage during development
Which of the following is an INCORRECT pairing?
A. viruses, acellular B. prokaryotes, no nuclei C. protozoa, multicellular D. fungi, cell wall