The underlying factor that allows an organism to become a separate species is _____.

a. ability to produce a hybrid
b. polyploidy
c. sufficiently large genetic differences
d. isolation
e. genetic divergence


Ans: c. sufficiently large genetic differences

Biology & Microbiology

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After PCR, the amplification control has failed to yield a product. What should you do?

a. Report out Indeterminate b. Report out Negative because there was no amplification from the sample c. Check the original DNA or RNA prepara-tion. If it is adequate, repeat the amplifi-cation. If not, re-isolate the nucleic acid. d. Repeat it using a higher concentration of amplification control in the reaction.

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Which community type seems to have a higher biodiversity, the prairie dog or the mesquite?

a. prairie dog b. mesquite

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The process by which the presence and activity of neighboring cells determine an aspect of development is called ________

Fill in the blank(s) with correct word

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Which of the following is a nontoxic compound that is excreted as crystals mixed with just enough water to produce a thick, white paste?

A. Ammonium nitrate B. Ammonia C. Uric acid D. Potassium sulfate E. Urea

Biology & Microbiology