Which character would allow you to identify something as an echinoderm and not a chordate?
A. Dorsal hollow nerve cord
B. Radial symmetry
C. Pharyngeal gill slits
D. Post-anal tail
Ans: B. Radial symmetry
Biology & Microbiology
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Which of the following is true regarding cell
membrane proteins? a. All are free to move laterally through the lipid bilayer. b. All are rigidly positioned. c. Some are tethered by cytoskeletal elements. d. Some form complexes. e. Some are tethered by cytoskeletal elements, and some form complexes.
Biology & Microbiology
If mitosis makes somatic cells, what does meiosis make?
A) Sex cells B) Heart cells C) Nerve cells D) Body cells
Biology & Microbiology
Triplet on tRNA
(A) Nonsense codon (B) Anticodon (C) Ribosome (D) Exon (E) Poly-A tail
Biology & Microbiology
________ is the source of the oxygen gas released by a photosystem
A) H2O B) Chlorophyll a C) CO2 D) C6H12O6
Biology & Microbiology