The destruction or removal of all viable organisms is called
A. antisepsis.
B. sterilization.
C. sanitization.
D. disinfection.
Answer: B
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In mollusks, ctenidia are necessary for which function?
a. breathing b. excretion c. reproduction d. locomotion
____ is the process by which water removes and carries away soil nutrients
a. Erosion b. Diffusion c. Leaching d. Water dilution effect e. Absorption
The geneticist who discovered the white eye mutation in Drosophila and helped establish that genes are carried on chromosomes was
A. Janssens. B. Mendel. C. Morgan. D. Sturtevant. E. Sutton.
The body uses atoms in different ways to accomplish different tasks. For example, one portion of the body's calcium supply strengthens bones, whereas another portion combines with proteins to stimulate blood clotting after tissue injury. Which of the
following statements provides the most logical chemical explanation of calcium's ability to perform such different functions? A) The bone contains calcium salts, which are less reactive than the calcium ions found in the blood. B) The calcium in blood is a more reactive form of the atom and therefore has fewer protons than the calcium in bone. C) There are many different isotopes of calcium, and the most reactive isotope is found in the bone. D) The calcium in blood has a lighter atomic mass than the calcium in bone and is in a more reactive form.