The main reason that the spores of disease-causing bacteria are dangerous is that they _____.?
A) ?are very difficult to destroy
B) ?cause very serious infections
C) ?cause infections that are difficult to diagnose
D) ?destroy the cells they inhabit
A
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Corns are
A. areas of white skin pigmentation. B. growths emanating from the nostrils. C. keratinized conical masses on toes. D. scaly scalp areas.
Which hormone decreases the concentration of calcium ions in body fluids?
A) triiodothyronine B) thymosin C) parathyroid hormone D) thyroxin E) calcitonin
The subunit of protein is the ________.
A. nucleic acid B. carboxylic acid C. amino acid D. fatty acid
A sarcomere is the
A. contractile thread that extends the length of the muscle fiber. B. plasma membrane of a muscle fiber. C. protein strand composed of actin or myosin. D. structural and functional unit of the skeletal muscle fiber. E. cytoplasm of a muscle fiber.