Which is NOT an element?

a. water
b. oxygen
c. carbon
d. chlorine
e. hydrogen


Answer: a

Biology & Microbiology

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An airborne chemical that is used to communicate with members of the same species is called a ____

Fill in the blank with the appropriate word.

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Specialized islet cells that secrete hormones are found scattered throughout the

a. adrenal cortex. b. liver. c. thymus. d. adrenal medulla. e. pancreas.

Biology & Microbiology

Parental care of offspring:a

for many animals has a lower cost than benefit. b. results in a decreased probability that each offspring will survive. c. is more common in species in which the female produces two or more times during a breeding season. d. is more common among male animals than among females. e. is more common among male fishes than among females.

Biology & Microbiology

Arrange the following from the ecosystem with the smallest average NPP to the ecosystems with the largest NPP

1) lake 2) savannah 3) estuary 4) tropical rain forest 5) open ocean a. 1, 2, 3, 4, 5 b. 2, 1, 4, 3, 5 c. 2, 1, 5, 3, 4 d. 5, 2, 1, 3, 4 e. 5, 1, 2, 3, 4

Biology & Microbiology