Four of the five answers can be detected by testing the urine. Select the exception
a. ovulation
b. pregnancy
c. water-soluble drug use
d. exposure to pollutants
e. white blood cell count
e
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Which of the following tree stands would you predict has the highest NPP?
A) 0-1 years old B) 1-10 years old C) 30-60 years old D) over 100 years old
Ponds have pondweeds attached to the bottom, insect larvae that feed on the pondweeds, fish that eat the insects, and birds like great blue herons that eat the fish. In this ecosystem which of the following would have the largest total biomass (all individuals of the category)?
A. large fish B. small fish C. insects D. great blue herons
__________, products of master genes, act as long-range signals that diffuse out from a source and form a concentration gradient.
Fill in the blank(s) with the appropriate word(s).
Innate, physical barriers of host defenses ______. Select All That Apply
Fill in the blank(s) with the appropriate word(s).