Which gas or gases bind to hemoglobin more strongly than oxygen?
a. carbon monoxide only
b. carbon dioxide only
c. nitrogen only
d. both carbon dioxide and carbon monoxide
e. both carbon dioxide and nitrogen
a
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Bioluminescence in Vibrio harveyi is due to an alternate sigma factor that prevents ________ from binding to Lux mRNA, thus allowing translation of bioluminescent genes.
A. antisense B. autoinducing proteins C. phosphate D. ribosomes
Scanning electron microscopy (SEM) is especially suited to
A) observe living specimens. B) examine internal cellular structure. C) create a sense of depth. D) both choices A and C E) choices A, B, and C
These birds resemble each other, but live in vastly different geographic areas. What is their evolutionary relationship?
1.They cannot be related if they lived on different continents.
2.They are vestigial forms of one another.
3.They resemble each other outwardly but are very different internally.
4.They all had a common ancestor.
Fire in the dry shrublands does not kill the small
bushy plants most probably because a. these plants have a tough protective bark. b. their leaves are very heavy and wet. c. they can resprout from root crowns. d. the Forest Service puts the fires out quickly. e. the fires burn the taller plants and burn out before reaching ground level.