Edith's checkerspot butterflies are considered "indicator species" because they
a. can determine the make up of the community of organisms through predation.
b. are signals for the presence of predators that prey on the butterflies.
c. are important signals of ecological change.
d. are only present during certain seasons.
e. indicate when food supplies are low by changing their behavior.
C
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Monosaccharides may be characterized by all
EXCEPT which of the following? a. a ketone group b. carbon, hydrogen, and oxygen in a 1:2:1 ratio c. a backbone of five to six carbon atoms d. one aldehyde group e. the presence of glycerol and fatty acids
Four of the following are features found exclusively among all vertebrates. Which one is the exception?
a. notochord
b. pharyngeal gill slits
c. four legs
d. post-anal tail
e. dorsal nerve cord
The term applied to a morphogenetic process whereby cells extend themselves, making the mass of the cells narrower and wider, is _____
A) convergent extension B) induction C) elongational streaming D) bi-axial elongation
For each molecule of glucose that is metabolized by glycolysis and the citric acid cycle, what is the total number of NADH + FADH2 molecules produced?
A) 4 B) 5 C) 6 D) 10 E) 12