C4 plants conserve water by ________
A) shuttling CO2 from the Calvin cycle to the water-splitting photosystem
B) keeping their stomata closed when the weather is hot and dry
C) growing very deep roots
D) running the Calvin cycle at night
B
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All of the following are components associated with the bacterial cytoskeleton except
A) FtsZ. B) MreB. C) plaktin. D) crescentin. E) both choices B and C
Controls over eukaryotic gene expression guide _____
a. natural selection b. nutrient availability c. development d. all of these
To reproduce, many plants produce seeds–structures containing embryonic offspring along with nutrients inside a tough case. These offspring develop after being released by the parent plant
To which animal reproductive strategy is seed production most comparable? A) oviparous reproduction B) ovoviviparous reproduction C) viviparous reproduction
The two DNA chains in a double helix ________
A) are parallel to each other in 5' to 3' directionality B) have identical base sequences C) wind around each other in such a way that purines are always opposite pyrimidines and vice versa D) are held together due to the charges of their phosphate groups E) have an overall diameter of 2 ?m