Hair cells are important in the sense of
a. equilibrium.
b. hearing.
c. taste.
d. smell.
e. both equilibrium and hearing.
E
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What is the first step in energy flow through an ecosystem?
a. Top-level carnivores eat the herbivores or omnivores within the ecosystem. b. Producers absorb solar energy. c. Producers absorb nutrients from the soil. d. Producers are eaten by the herbivores. e. Decomposers break down the organic matter and make it available for the producers.
Green fluorescent protein is used to
a. label antibodies. b. visualize proteins in living cells. c. photobleach other fluorescent proteins. d. label DNA sequences.
Arrange the events of a second messenger system in the correct order
1) Protein kinase is activated. 2) G protein is activated. 3) The neurotransmitter binds to its receptor. 4) The protein closes the potassium channel. 5) Cyclic AMP is produced. 6) Phosphorylation takes place. a. 1 ? 2 ? 5 ? 6 ? 4 ? 3 b. 3 ? 5 ? 6 ? 1 ? 2 ? 4 c. 5 ? 2 ? 6 ? 1 ? 3 ? 4 d. 3 ? 2 ? 5 ? 1 ? 6 ? 4 e. 5 ? 2 ? 6 ? 1 ? 4 ? 3
Much of the work of breaking down the food we ingest is done by our
(a) stomach (b) teeth (c) gut microbiome (d) esophagus