Even a single stimulus can activate protein kinase A in presynaptic neurons involved in the gill-withdrawal reflex in Aplysia.

Answer the following statement true (T) or false (F)


True

Biology & Microbiology

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According to the textbook, prokaryotes absorb their nutrients from the environment; however, prokaryotes also have cell walls. What can you conclude from these statements?

A. Cell walls are permeable, allowing nutrients to pass through. B. Prokaryotes live in a hypertonic environment. C. Osmosis drives the movement of nutrients through the cell wall. D. Prokaryotic cell walls contain transport proteins.

Biology & Microbiology

Which of the following hypotheses relies on the chemical reaction between hydrogen sulfide (HS2) and iron (Fe) for the built up of a H2 concentration gradient to provide the necessary energy for the reduction of N2 to NH3?

A. Reducing Atmosphere Hypothesis. B. Extraterrestrial Hypothesis. C. Deep-Sea Vent Hypothesis. D. Both Reducing Atmosphere and Extraterrestrial Hypotheses. E. All three hypotheses use this exact reaction to create a chemical gradient to form amino acids.

Biology & Microbiology

The echinoderms are most closely related to the ________.

A. mollusks B. arthropods C. flatworms D. chordates

Biology & Microbiology

The Human Genome Project took much longer to complete and cost more than was originally

anticipated.

Biology & Microbiology