Which of the following is considered a peptide hormone?
a. estrogen
b. epinephrine
c. thyroxine
d. insulin
d. insulin
Biology & Microbiology
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Which category of animals had the most threatened and endangered species in 2012?
a. birds b. fishes c. insects d. reptiles
Biology & Microbiology
Which respiratory structure will connect the larynx to the bronchi?
a. Bronchial tree b. Pharynx c. Diaphragm d. Epiglottis e. Trachea
Biology & Microbiology
This animal is a tetrapod that has a cloaca,
aquatic larvae, and is tailless as an adult. This animal is
a. a salamander. b. a frog. c. a tunicate. d. a lizard. e. more than one of these.
Biology & Microbiology
Movement of substances that requires the expenditure of ATP molecules is called ____
a. facilitated diffusion b. simple diffusion c. osmosis d. active transport e. bulk flow
Biology & Microbiology