Which of the following is mismatched>
A. Methanogens - convert CO2 and H2 gases into methane
B. Extreme halophiles - adapted to salty habitats
C. Hyperthermophile - adapted to high temp
D. Psychrophiles - adapted to very low temp
E. Thermoplasmas - adapted to frozen environment
Ans: E. Thermoplasmas - adapted to frozen environment
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Which of these is found in all amino acids?
A. -COOH B. -COH C. -OH D. -NH2 E. Both -COOH and -NH2
A bell-shaped curve of phenotypic variation is
indicative of a. incomplete dominance. b. continuous variation. c. multiple alleles. d. epistasis. e. environmental variables on phenotypes.
Four of the five choices listed below are possible
causes of extinction. Select the exception. a. asteroid impact b. conservation c. tectonic change d. human activity e. climate change
Transfer RNA differs from other types of RNA because it
a. transfers genetic instructions from cell nucleus to cytoplasm. b. specifies the amino acid sequence of a particular protein. c. carries an amino acid at one end. d. contains codons. e. has different bases in its nucleotides.