Which of the following is the correct sequence from smallest to largest?
A. Cell, protein, amino acid, atom
B. Amino acid, cell, protein, atom
C. Amino acid, atom, cell, protein
D. Atom, amino acid, protein, cell
E. Protein, cell, amino acid, atom
Answer: D
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This figure shows the muscles of respiration. What muscles are indicated by number 1?
A. External intercostals B. Internal intercostals C. Scalenes D. Diaphragm E. Transversus thoracis
Which part of a neuron will have the highest density of voltage-gated Na+ channels?
a. the dendrites b. the cell body c. the axon hillock d. the axon e. the axon terminal.
Drugs that mimic the action of norepinephrine are likely to affect ________
A) the parasympathetic division of the ANS B) both the sympathetic and parasympathetic divisions of the ANS C) the sympathetic division of the ANS
If a species of animal evolves over generations to grow a large fan-blade like growth on its back to catch the wind and cool its body, this would be an example of responding to ________.
A. adaptation B. selection pressure C. climate change D. natural selection