The microorganisms that are occasionally found in or on the body are called
A.
abnormal microbiota.
B.
transient microbiota.
C.
variant microbiota.
D.
normal microbiota.
B
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Most body heat in endotherms is derived from _____ while most body heat in ectotherms is derived from ______.
A. metabolic processes, metabolic processes B. metabolic processes, their environment C. their environment, metabolic processes D. their environment, their environment E. fur, insulating scales
Mitochondria are about the same size as bacterial cells
a. True b. False
Scientists measured the pressure in the xylem of redwood trees at different heights and found that the higher they made their measurements, the lower the pressure. They extrapolated this to a pressure of zero, and concluded that the tallest a tree could grow is 122–130 meters. The tallest known tree on Earth is 112.7 meters. What assumption were the scientists making to conclude that when pressure was zero, the plant could grow no further?
A. Turgor pressure would be greater than gravity. B. Transpiration would be less than uptake of water from the xylem. C. Leaves above that point would not receive any sunlight. D. Leaves above that point would not receive any water. E. Stems above that point could not transport sugars in their xylem.
Plants produce oxygen when they photosynthesize. Where does the oxygen come from?
What will be an ideal response?