Some plants can tolerate flooding conditions by
A. forming additional adventitious roots.
B. formation of aerenchyma.
C. shedding their bark.
D. pumping water out of their roots.
E. opening their lenticels.
Answer: B
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Microbial degradation of hydrocarbons cannot take place using ________ as the electron acceptor.
A. nitrate B. carbon dioxide C. sulfate D. oxygen
By definition, linkage disequilibrium means that
A) alleles at separate loci occur together more than predicted by random chance. B) alleles at separate loci segregate randomly. C) two allelic variants are at least 60 m.u. apart. D) two allelic variants are 50 m.u. apart.
It took more than 100,000 years for the human population to grow to one billion individuals and took about ____ years
to add five billion more. a. 200 b. 20,000 c. 100,000
d. 200,000 e. 500,000
The ________ are the 23rd pair of chromosomes that carry the traits that determine gender
Fill in the blank(s) with correct word