The wing of a penguin is ________ the wing of a butterfly
A) structurally identical to
B) superior to
C) homologous to
D) analogous to
D
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Although the inner leaflet of the gram-negative outer membrane is composed mainly of phospholipids, the outer leaflet of the outer membrane contains
A) pseudopeptidoglycans. B) lipoteichoic acids. C) poly-?-hydroxybutyric acids (PHB). D) lipopolysaccharides (LPS).
Humans contract Chagas disease when the reduviid bug defecates while taking a blood meal and the parasites in the feces are rubbed or scratched into the bite wound or onto mucosal surfaces. Which stage in the blood infects the host cells?
a. Amastigote b. Epimastigote c. Trypomastigote d. Promastigote
What is another word for population density?
A) distribution B) demographics C) abundance D) carrying capacity
Some bacteria are resistant to erythromycin as a result of mutation of their ribosomal RNA. What type of resistance does this represent?
A) alteration of the target of the drug B) inactivation of the drug C) change in the permeability of the drug D) overproduction of an enzyme in a key metabolic pathway E) removal of the drug via a pump