Cells in which two domains lack a membrane-bound nucleus?
A. Eukarya
B. Archaea
C. Eubacteria
Answer: B & C.
B. Archaea
C. Eubacteria
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Why is it important to have an antibiotic resistance gene in the cloning plasmid?
a. It makes the bacteria resistant to the antibiotic. b. It provides a way for researchers to sort the bacteria that have the cloning plasmid from the bacteria that don't have the cloning plasmid. c. It aids scientists in developing new antibiotic treatments. d. It provides a way for sorting bacteria that have the gene of interest from the bacteria that just have an "empty" cloning plasmid. e. It makes the bacteria produce more clones.
Rainfall is greater and the vegetation more dense on the windward side of a mountain range than on the leeward side, where a(n) ________ is formed
Fill in the blank(s) with correct word
When a peptide bond is created between two amino acids:
a. the carboxyl group of the first amino acid is joined to the carboxyl group of the second. b. the carboxyl group of the first amino acid is joined to the amino group of the second. c. the amino group of the first amino acid is joined to the amino group of the second. d. the amino group of the first amino acid is joined to the carboxyl group of the second.
When energy flows from one trophic level to another, only a small amount is actually used. Which of the following uses of energy by an organism allows for the least amount of transfer to a different trophic level?
A. growth B. excretion C. cellular respiration D. death E. reproduction