Describe five functions of proteins.
What will be an ideal response?
Proteins catalyze chemical reactions, transport other substances, act as chemical messengers, form structures such as nails and hair, aid in defense against invaders, and allow muscles to contract.
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Flowering plants originated during the
A. Permian Period. B. Tertiary Period. C. Devonian Period. D. Cretaceous Period. E. Jurassic Period.
Which is true of iodine?
A. It does not readily kill endospores. B. It may be used as an antiseptic or as a disinfectant. C. It is important to use it at the recommended dilution. D. It is usually found as tinctures or iodophors. E. All of the choices are true.
Which of the following was the most likely
food source for first terrestrial tetrapods?
a. leaves b. insects c. small mammals d. worms e. eggs
Degranulation of mast cells leads to
A. lymph node swelling. B. constricted bronchioles. C. constriction of blood vessels. D. decreased mucus production.