"H zones" in skeletal muscle are composed of
a. discs to which thin filaments are anchored.
b. stacked thick filaments along with parts of thin filaments that overlap both ends.
c. thin filaments but no thick filaments.
d. thick filaments but no thin filaments.
e. discs to which thick filaments are anchored.
D
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How do CAM plants minimize photorespiration?
A. Stomata are only opened at night, storing carbon dioxide in the stromata. During the day the carbon dioxide is released for photosynthesis. B. Stomata are only opened at night, storing carbon dioxide in malate. During the day the carbon dioxide is released for photosynthesis. C. The light reactions and the Calvin cycle occur in different cells, so oxygen does not come into contact with rubisco. D. Stomata are only opened at night, storing oxygen in malate. During the day the oxygen is released for photosynthesis. E. The light reactions and the Calvin cycle occur in different cells, so carbon dioxide does not come into contact with rubisco.
In large populations, the Hardy-Weinberg equilibrium principle can be used to determine whether evolution is occurring
For instances where allelic frequencies are indicated by p and q, the resultant genotype frequencies are indicated by which of the following equations? A) p2 + q2 B) p2 + pq + q2 C) p2 + 2pq + q2 D) p2 + (pq)2 + q2
Which of the following is a function of stems?
a. sexually reproduce b. absorb nutrient minerals c. produce new tissues d. transport dissolved gases e. anchor plants
Which site on a ribosome does the release factor bind to?
a. site A b. site E c. site P d. site R