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