Bacteria synthesize CDP-diacylglycerol in order to build ________, a major cell membrane phospholipid component.
A. lipopolysaccharide
B. peptidoglycan
C. lipid rafts
D. phosphatidylethanolamine
Answer: D
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Atria differ from ventricles in that they
a. are larger. b. have thicker walls with more muscle. c. receive blood from veins. d. have a higher blood pressure. e. empty through semilunar valves.
The current rapid loss of species is considered by many scientists to be another mass extinction. What may be causing this increase in extinction rate, beyond background extinction?
A) a recent increase in earthquakes worldwide B) human population growth and the resulting habitat changes worldwide C) global climate change D) changes in the number of solar flares observed recently
Which of these structures is NOT formed during gastrulation?
a. Blastocoel b. Archenteron c. Endoderm d. Mesoderm e. Ectoderm
Where are the olfactory receptor cells located?
What will be an ideal response?