Describe the structures that are characteristic of a prokaryotic cell.
What will be an ideal response?
Answer: Like eukaryotic cells, prokaryotic cells are surrounded by a plasma membrane and have DNA, cytoplasm, and ribosomes. Like plant cells, they also have cell walls. Unlike eukaryotic cells, they may have a cell capsule, and they have a single large chromosome that is not surrounded by a nuclear membrane. Prokaryotes may have flagella (also present in some eurkaryotes) for motility, pili for conjugation, and fimbriae for adhesion to surfaces.
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Describe the action of white blood cells that act as phagocytes
What will be an ideal response?
Gemmae function for
a. sexual reproduction. b. water retention. c. anchorage of a liverwort thallus to the substrate. d. asexual reproduction.
Renin is an enzyme that acts on
A. angiotensinogen. B. angiotensin II. C. aldosterone. D. angiotensin I. E. atrial natriuretic factor.
The damage caused by ultraviolet radiation is
A) never repaired. B) repaired during transcription. C) repaired during translation. D) cut out and replaced. E) repaired by DNA replication.