Binary fission is:
A. cell division by meiosis
B. cell division by mitosis
C. cell division by simple splitting
D. fluorescent in situ hybridization (FISH)
E. exchange of genes between two cells
C. cell division by simple splitting
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Compared to mammals and reptiles, what characteristic prevents amphibians from surviving far from water?
A. Their limbs are too weak to support their weight on land. B. Their cartilaginous endoskeleton would dry out on land. C. They do not have any lungs and cannot breathe out of the water. D. Their eggs do not have an amnion to prevent them from drying out.
The original three components of the cell theory are that all organisms
A. have DNA, DNA is the fundamental unit of life, and all cells come from preexisting cells. B. are made of one or more cells, the cell is the fundamental unit of life, and all cells come from preexisting cells. C. are made of one or more cells, the cell is the fundamental unit of life, and all cells have a nucleus. D. have DNA, are made of cells, and all cells produce proteins. E. are made of one or more cells, all cells contain DNA, and all cells come from preexisting cells.
Sarin nerve gas paralyzes muscle by interfering with neuronal transmission by which of the following?
A) serotonin B) GABA C) acetylcholine D) encephalin E) glutamate
Which of the following is a FALSE statement about prokaryotes?
A) Prokaryotic cells contain ribosomes. B) Prokaryotes are so small that they can be seen only with a high-power electron microscope. C) Prokaryotes may contain extra genes in plasmids. D) Prokaryotes have a plasma membrane, similar to that of eukaryotes.