Tracheal tubes and spiracles are characteristically found in annelids. Indicate whether the statement is true or false
False - insects
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Which of the following is the correct order of steps of gas transport and exchange?
A. ventilation, diffusion across the respiratory surface, circulation, diffusion between blood and cells B. diffusion across the respiratory surface, ventilation, diffusion between blood and cells, circulation C. ventilation, circulation, diffusion across the respiratory surface, diffusion between blood and cells D. circulation, diffusion across the respiratory surface, ventilation, diffusion between blood and cells E. diffusion between blood and cells, circulation, ventilation, diffusion across the respiratory surface
A molecule of water in the middle of a chunk of ice will usually have ____ hydrogen bonds with other water
molecules.
a. 2 b. 3 c. 3.4 d. 4 e. 6
The scorpion sting is described as one of the most painful stings. The pain is associated with the neurotoxins from the sting that cause the sodium channels to
A. remain open. B. remain closed. C. open and close repeatedly. D. misfire. E. None of the answer choices is correct.
The first amino acid of a new polypeptide chain is
a. AUG. b. cysteine. c. variable. d. phenylalanine. e. methionine.