The type of reproductive barrier that occurs when reproductive structures of different species are physically incompatible is referred to as ____

Fill in the blank(s) with the appropriate word(s).


Answer: mechanical isolation

Biology & Microbiology

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Factors that work generically against any foreign substance entering the host are described as

A. innate immunity. B. specific immunity. C. irregular immunity. D. immune metabolism.

Biology & Microbiology

A human female could ovulate about ____ times in her lifetime

a. 40 b. 400 c. 4,000 d. 40,000 e. 400,000

Biology & Microbiology

The DNA sequence recognized by restriction endonucleases is generally how long?

a. 1?2 nucleotides b. 4?8 nucleotides c. 10?15 nucleotides d. 24?32 nucleotides e. 36?47 nucleotides

Biology & Microbiology

Fertilization resulting in a chromosome number of 45 in humans is ____

a. monosomy b. trisomy c. haploid d. diploid e. triploid

Biology & Microbiology