The theory illustrated by Figure 21-1 is used to explain the origin of:

a. anaerobes.
b. prokaryotes.
c. eukaryotes.
d. vascular plants.
e. protobionts


C

Biology & Microbiology

You might also like to view...

In eukaryotes, glycolysis occurs in the:a

mitochondrial inner membrane. b. lysosomes. c. Golgi complex. d. cytosol. e. mitochondrial matrix.

Biology & Microbiology

When light hits a pigment, how many electrons are excited by a single photon?

a. one b. two c. three d. four

Biology & Microbiology

In which plants is the gametophyte larger and longer-lived?

A. Sporophyte B. Lycophyte C. Bryophyte D. Anthocerotophyta E. Monilophyte

Biology & Microbiology

Which of the following is not true of the second step of translational elongation in bacteria?

A. The carboxyl group oxygen of the A-site amino acid is the nucleophile in peptide bond formation. B. A peptide bond is formed between the two amino acids bound by the tRNAs in the A and Psites. C. The growing polypeptide chain is transferred to the tRNA in the A site. D. The ?-amino group of the A-site amino acid attacks the carbonyl carbon of the P-site amino acid.

Biology & Microbiology