Sound waves begin in the oval window create pressure waves first in the ____
a. middle ear
b. semicircular canals
c. cochlear duct
d. scala tympani
e. scala vestibuli
ANSWER: e
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Eukaryotic-like (possessing a defined nucleus) cells were obtained from a Martian soil sample. The nucleus was carefully isolated and the chromatin obtained. The fibers had a "beads on a string" appearance, suggesting some type of "histones." Following digestion with micrococcal nuclease, protein removal, and gel electrophoresis, DNA fragments were obtained that are multiples of 280 base pairs
in length. Longer incubation with micrococcal nuclease prior to protein removal results in fragments 200 base pairs in length. The amount of DNA that is wrapped around the "core histones" is therefore A) 80 base pairs in length. B) 200 base pairs in length. C) 360 base pairs in length. D) 480 base pairs in length. E) Not enough information is given to determine the answer.
Answer the question using the accompanying figure. The structure labeled “C” is a modified form of the ____
a. Golgi apparatus b. plasma membrane c. rough endoplasmic reticulum d. smooth endoplasmic reticulum e. nuclear membrane
Which of the following is a photosynthate produced by photosynthesizing leaves?
a. ATP b. sucrose c. glycine d. chlorophyll
In the classic argument of ‘nature vs. nurture’, nature would most correspond with
a. genes. b. environment. c. divine intervention. d. environment and genes. e. genes, environment, and genes.