Which nucleotide triplet specifies tryptophan?
a. UAA
b. UAG
c. UGG
d. UGA
c. UGG
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The minimum level of depolarization required to initiate an action potential in an excitable cell is
called the
a. electrical potential. b. refractory potential. c. membrane potential. d. resting potential. e. threshold potential.
Horsehair worms, in the phylum Nematomorpha, do not have a respiratory system. They are usually found in puddles of water or on damp sidewalks and patios, or they may come wiggling out of insects
These creatures have no economic importance other than being parasitic to some insects. Based on this scenario, horsehair worms are most likely to A) have a large surface area compared with their volume. B) be unable to efficiently digest food. C) use large amounts of energy. D) have very thick bodies. E) have a dry skin surface.
List and briefly describe three differences between prokaryotic and eukaryotic cell division
What will be an ideal response?
You turn on the shower and check the water temperature with your hand. Your brain is able to monitor increasing temperature because the thermosensitive neurons in your skin
A. integrate temperature information. B. transmit bigger action potentials to the brain as the water warms up. C. transmit action potentials to different brain regions as the water warms up. D. transmit action potentials at a greater rate when the water warms up. E. gradually adapt to the stimulus.