Neurotransmitters that open Na+ channels and trigger action potentials in receiving cells are called
A) inhibitory.
B) excitatory.
C) sympathetic.
D) parasympathetic.
Answer: B
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The processes of transcription and translation are collectively known as
A. RNA processing. B. gene duplication. C. protein synthesis. D. DNA synthesis. E. gene expression.
Why must mosses live in moist environments?
A. Because they depend on water to reproduce B. Because they are pollinated by fish and aquatic insects C. Because they grow as a mat D. Because they lack a waxy outer layer
Movement of sister chromatids back and forth during prometaphase is known as ________
Fill in the blank with correct word.
Figure 33.17
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Use the accompanying figure to answer the following question.
The structure that protects the eyeball is indicated by the letter ____.
A. A B. B C. C D. D E. E