Which of the following is not associated with adhesive junctions?
A) desmosomes
B) hemidesmosomes
C) plaques
D) connexin
E) cadherins
D) connexin
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Enzymes catalyze a reaction by
A. increasing the activation energy of the reaction. B. decreasing the amount of energy released by the reaction. C. decreasing the activation energy of the reaction. D. increasing the amount of energy released by the reaction.
Organisms that grow well at 0°C and have optimum growth temperatures of 15°C or lower are called
A. frigiphiles. B. mesophiles. C. psychrotrophs. D. psychrophiles.
The data from the butterfly experiment reflected
which of the following? a. natural selection b. food choices by predators c. the ability of birds to find the prey d. the role of mimicry e. all of these
It has been hypothesized that chloroplasts originated from photosynthetic cyanobacteria that became symbiotic inside a host cell. Which of the following observations provides the strongest evidence for this suggestion?
a) microscopically, chloroplasts appear similar to cyanobacteria b) chloroplast DNA shows clear similarities to cyanobacteria DNA c) Both chloroplasts and cyanobacteria are green and perform photosynthesis d) Photosynthesis cyanobacteria and fungi form a mutualistic association in lichen