Which of the following occurs during the Calvin cycle of photosynthesis?
A) Chlorophyll acts as an enzyme, but only in the dark.
B) Carbon dioxide is converted to chemicals that can be used to make sugars.
C) Nothing occurs because the plant rests in the dark.
D) Water is converted to its most basic elements, hydrogen and water.
B
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Which microtubule type is paired to its correct function?
A. Polar microtubules - positioning of the spindle apparatus B. Aster microtubules - positioning of the spindle apparatus C. Kinetochore microtubules - separate the poles D. Polar microtubules - bind kinetochore to centromere
A community in which many species are involved in a food web is ____
a. more fragile since organisms have more than a single food source b. more fragile since organisms have only a single food source c. more stable since organisms have more than a single food source d. more stable since organisms have only a single food source e. most prone to damage from human interference
What tissue type produces the tough coverings that package organs?
A. Collagen B. Loose connective tissue C. Dense regular connective tissue D. Dense irregular connective tissue E. Adipose
Which system involves plasma proteins
activated when an organism's pattern receptors become bound to anything? a. cytokine b. complement c. suppressor d. enhancer e. coagulation