The green sulfur bacteria are ________.
A. facultative anaerobes
B. microaerophilic
C. obligate anaerobes
D. either obligate anaerobes or facultative anaerobes
Answer: C
You might also like to view...
Starting from the root of a phylogenetic tree, any node that is shown farther from the root than other nodes, means
A. the two species (or groups of species represented) at the farthest node diverged by sympatric speciation.
B. that only those species at the farthest node, from the root, are in a clade.
C. convergent evolution has selected for the species (or groups of species represented) to be similar.
D. the species (or groups represented) diverged most recently from a common ancestor.
E. the species (or groups of species represented) are in the outgroup.
Intermediate filaments
A) are 7 nm in diameter. B) can be composed of the protein vimentin. C) are abundant in plant cells. D) are the only cytoskeletal filament responsible for animal cell shape. E) A, B, C, and D.
Enzymes called ____ form breaks in the DNA molecules to prevent the formation of knots in the DNA helix during
replication. a. topoisomerases b. single-strand binding proteins c. DNA polymerases d. RNA polymerases e. DNA ligases
A ________ group does not contain the most recent common ancestor.
Fill in the blank(s) with the appropriate word(s).