If the R-R interval is 800 msec (0.8 sec), what is the heart rate?

#Question id: 1159

#Unit 4. Cell Communication and Cell Signaling

Cholera toxin can make you sick through overactivation of a Gs pathway even if your body stops making the ligand associated with activation of the pathway. Knowing this, which of the following CANNOT be true about cholera toxin?

#Question id: 2466

#Unit 2. Cellular Organization

Multinucleated cells may result from a defect in:

#Question id: 9614

#Unit 9. Diversity of Life Forms

Some molecular data place the giant panda in the bear family (Ursidae) but place the lesser panda in the raccoon family (Procyonidae). Consequently, the morphological similarities of these two species are probably due to

#Question id: 11809

#Unit 6. System Physiology – Plant

Shortly after the discovery of kinetin, it was observed that the differentiation of cultured callus tissue derived from tobacco pith segments into either roots or shoots depends on the ratio of auxin to cytokinin in the culture medium. Whereas

a) high auxin:cytokinin ratios stimulated the formation of roots

b) high auxin:cytokinin ratios stimulated the formation of shoots

c) low auxin:cytokinin ratios led to the formation of shoots

d) low auxin:cytokinin ratios stimulated the formation of roots

which of the following combination is correct about the ratio of auxin to cytokinin

#Question id: 3767

#Unit 3. Fundamental Processes

Which of the following characteristics would you expect of a eukaryotic organism that lacks the enzyme telomerase?