A strain is

a. a subdivision within a family that has a characteristic trait or traits.
b. a subgroup within a species that has a characteristic trait or traits.
c. a group within a branch that has a characteristic trait or traits.
d. a group within a phylum that has a characteristic trait or traits.
e. a subgroup within a domain that has a characteristic trait or traits.


Answer: b. a subgroup within a species that has a characteristic trait or traits.

Biology & Microbiology

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A newly hatched duck adopts the first large, moving object it sees as its mother. This is an example of ________

Fill in the blank(s) with correct word

Biology & Microbiology

The modern term derived from the Greek root words meaning "ancient," "having existed," and "study of" is

A. anthropology. B. biogeography. C. museology. D. paleontology. E. sedimentology.

Biology & Microbiology

The simplest nervous system occurs among

A. platyhelminthes. B. cnidarians. C. nematodes. D. mollusks. E. sponges.

Biology & Microbiology

An ________ may arise when three sperm cells are involved in fertilization of a single egg

A) aneuploidy B) allotetraploid C) allotriploid D) autotetraploid E) autotriploid

Biology & Microbiology