In aquatic systems, which of the following are the
first organisms to disappear when oxygen levels
drop?
a. stoneflies and mayflies
b. carp and goldfish
c. Tubifex worms
d. ducks and geese
e. none of these
Answer: a
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The openings to the ___________ system (respiratory system) in insects are termed _________.
A. spiracle, tracheae B. tracheal, bronchi C. spiracle, alveoli D. tracheal, spiracles E. tracheal, stomata
Wilkins and Franklin studied the structure of DNA using ____
a. molecular scale models of nucleotides b. X-ray diffraction c. computer-assisted graphics d. electron microscopy e. light microscopy
In the microarray shown in your book, the cDNAs were labeled with red and green fluorescent tags
How then do you end up with spots on the microarray emitting yellow light?
a. In light, red and green are two of the primary colors, and the combination of the two will produce yellow light. b. The yellow light comes from the laser, and a yellow spot indicates that neither cDNA hybridized to that spot on the microarray. c. The over expression of one cDNA relative to the other will skew the color pattern of the spot on the microarray. This result in the yellow color. d. The color choice was an arbitrary decision by the artist and doesn't reflect how the process actually works. e. Yellow spots are those that contain no DNA probes on the chip.
The electron transport system:
A. both a and d are correct B. utilizes the nuclear membrane of eukaryotes C. utilizes the mitochondrial membrane of prokaryotes D. generates a concentration gradient of protons E. requires a membrane