In cactus plants, the__________ is the main organ of photosynthesis
a. leaf
b. spine
c. stem
d. flower
e. fruit
c
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How can we explain that water is a solvent?
A. Water is a heavy substance, and as such can disrupt pre-existing bonds. B. Water is highly cohesive and adhesive, which allows it to bind to different substances as a solvent. C. Water has a polar nature, and as such its polar molecules will bind to substances that have positive or negative charges. D. Water is very dense in its liquid state, which allows it to bind to different substances as a solvent.
Histone variants:
A. have been identified for H2B and H4 but not for H2A and H3. B. differ in their C-terminal sequences but not in their N-terminal sequences. C. that have been identified are associated with transcriptional activation only. D. have variant patterns of modifications as a result of the structural differences in their terminal sequences. E. have been found to affect all cellular processes that involve DNA except DNA repair.
The high productivity of coral reefs is a direct result of:
a. the large numbers of phytoplankton and algae living on reefs. b. the tight symbiotic relationship between coral polyps and zooxanthellae. c. the high concentration of nutrients in tropical waters. d. the upwelling of tropical waters.
If you were to estimate the linear probability model for whether or not a student passed their econometrics class and how that relates to if they are a business major (1 if yes, 0 if other), what will the coefficient on the dichotomous business major variable be?
A. The average pass rate of all students B. The econometrics class pass rate of business majors C. The econometrics class pass rate of non-business majors D. The difference in pass rates of business majors and non-business majors