Which of the following is true about the cell-wall-less archaeal genus Thermoplasma?
A. They are spherical at temperatures below 59°C.
B. They are spherical at temperatures below 59°C and they are filamentous at temperatures at 59°C and higher.
C. They are filamentous at temperatures at 59°C and higher.
D. They are non-motile.
Answer: B
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The parts of the brain where addiction arises are
A) the suprachiasmatic nuclei, the ventricles, and the cerebral cortex. B) the nucleus accumbens, the ventral tegmental area, and the prefrontal cortex. C) the frontal medulla, the cerebellum, and the hypothalamus. D) the presynaptic neuron, postsynaptic neuron, and synapse.
Describe the process that recycles oceanic crust
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The RNA that brings proteins to the ribosome is called:
a. ribosomal RNA. b. transfer RNA. c. messenger RNA. d. RNA. e. helper RNA.
What do scientists who support the Miller and Urey model of the formation of the first organic molecules on Earth have in common with those scientists who support the hypothesis that organic molecules arrived on early Earth carried in a meteorite?
A) Both support the idea that the first organic molecules on Earth had their origins in outer space. B) Both support the idea that conditions on early Earth led to the formation of organic molecules in the atmosphere. C) Both support the idea that the first organic molecules on Earth were formed from inorganic molecules. D) Both support the idea that only living things can produce organic molecules.