In bone, crystals of calcium phosphate impregnate the extracellular matrix containing fibers of 

A. troponin.
B. myosin.
C. actin.
D. chitin.
E. collagen.


E. collagen.

Biology & Microbiology

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In humans, blood cells are produced in the

a. bone marrow. b. heart. c. kidneys. d. liver. e. lymph nodes.

Biology & Microbiology

Which process employs exposing cells cultured in the laboratory to DNA with a gene of interest?

a. transformation b. transfection c. DNA fingerprinting d. polymerase chain reaction e. gel electrophoresis

Biology & Microbiology

What happens to the photosynthetic reactions when no sunlight is present?

What will be an ideal response?

Biology & Microbiology

If a prodromal period exists for a certain disease, it should occur prior to

A) incubation. B) illness. C) decline. D) convalescence.

Biology & Microbiology