For water to vaporize
A. energy must be supplied.
B. energy must be released.
C. hydrogen bonds are broken.
D. both energy must be supplied and hydrogen bonds broken.
E. both energy must be released and hydrogen bonds broken.
D. both energy must be supplied and hydrogen bonds broken.
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Which of the following organisms has the largest number of protein-coding genes?
a. E. coli (bacteria) b. Saccharomyces cerevisiae (yeast) c. Homo sapiens (human) d. Oryza sativa (rice) e. Drosophila melanogaster (fruit fly)
Tear ducts pass between which two bones?
a. maxilla and sphenoid b. sphenoid and ethmoid c. nasal and lacrimal d. lacrimal and zygomatic e. lacrimal and maxillary
Researchers studying groupies in Trinidad found that guppies in streams with high predation reproduced earlier and more frequently. Which of the following is most important in driving the guppies to change their life history in face of predation?
A. The guppies are an equilibrium species. B. The guppies are an opportunistic species. C. Density-independent factors affects the guppy populations. D. Density-dependent factors affects the guppy populations. E. Sexual selection affects the guppy populations.
What is the most serious consequence of untreated dehydration?
a. syncope b. death c. heat exhaustion d. heat stroke