Two populations of organisms belong to the same biological species when they
A) cannot mate with each other because mating occurs at different times.
B) use different types of behaviors or physical features to attract mates.
C) have anatomical features that make it difficult for organisms from the two populations to mate with one another.
D) encounter each other, mate, and produce viable, fertile offspring under natural conditions.
Answer: D
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A. true B. false
Members of the ____ lineage are highly active, have a closed circulatory system, and a high oxygen requirement
a. Cephalopoda b. Polyplacophora c. Platyhelminthes d. Gastropoda
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"Bluecomb" septicemia in turkeys and other species of fowl (chickens, ducks, emus, parrots, peacocks, pheasants) is caused by:
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