What would be required for the last product of glycolysis, pyruvate, to enter the Krebs cycle?
A. more glucose for energy
B. oxygen
C. ATP
D. carbon dioxide
Answer: B
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Megakaryocytes fragment to produce:
a. red blood cells b. lymphocytes c. platelets d. eosinophils e. neutrophils
Gnetophytes are different from other gymnosperms in that gnetophytes have vessel elements
____________________ Indicate whether the statement is true or false.
The Earth is spherical, which causes differences in the intensity of solar radiation at different latitudes. The Earth is also titled on its axis at a 23.5° angle. How do you think this tilt affects the intensity of solar radiation?
A. The Northern hemisphere has a higher intensity of solar radiation than the Southern hemisphere because it is tilted toward the Sun year round. B. The sun's rays strike the Northern hemisphere more obliquely during its winter months and less obliquely during its summer months. C. The Northern hemisphere has a lower intensity of solar radiation than the Southern hemisphere because it is tilted away from the Sun year round. D. The sun's rays strike the Northern hemisphere more obliquely during its summer months and less obliquely during its winter months. E. In the Northern and Southern hemispheres, equal latitudes receive the sun's rays at equal angles year round.
In addition to their characteristic cilia, most ciliates contain two types of
A. cysts. B. wood-digesting enzymes. C. flagella. D. chloroplasts. E. nuclei.