Because all organisms synthesize protein, the DNA nucleotide sequences coding for _____ have been highly
conserved during evolution.
a. tRNA
b. rRNA
c. mRNA
d. snRNA
e. SRP RNA
b
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Which of the following statements about plant toxins against herbivores is false?
A. The toxin may be kept in a membrane-bound structure to keep it from harming the plant. B. The toxin may not be toxic unless it is metabolized in the intestine of a herbivore. C. The toxin may have also have a bad taste. D. Even a little bit of the toxin will be deadly. E. Some toxins can over stimulate particular physiological processes.
The conversion of PGAL to pyruvate is
accompanied by a. anaerobic respiration. b. photophosphorylation. c. the electron transfer chain. d. substrate-level phosphorylation. e. the Krebs cycle.
A mountain lion, or puma, has the scientific name Felis concolor. The term Felis is the
A) species. B) genus. C) kingdom. D) order. E) family.
Which of the following occurred in the Precambrian period
What will be an ideal response?