Animal A can breed with animal D and produce a fertile offspring, animal C. If animal A breeds with animal B, they have a sterile offspring, animal E. The animals that belong to the same species are 

A. A and E.
B. A and B.
C. A and C.
D. B and E.


C. A and C.

Biology & Microbiology

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Which invertebrate is thought to reign as a formidable predator?

a. Squids b. Lobsters c. Whelks d. Seastars

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Zero population growth refers to

a. a point at which the number of individuals entering the population is equal to the number exiting. b. when the population size reaches zero. c. when more individuals exit the population than enter. d. the point at which the population size just starts to decrease. e. a rapid increase in the population size.

Biology & Microbiology

S2 = S (Xi ? X)2/n ? 1 is the formula for calculating which statistical value?

A) variance B) mean C) covariance D) standard deviation

Biology & Microbiology

The enzyme that creates ATP during electron transport is called:

A) ATP creatase. B) ATP synthase. C) ATP polymerase. D) ADP phosphotransferase.

Biology & Microbiology