Which statement is false?
a. A molecule is made of at least two atoms.
b. Compounds are made of elements.
c. Two atoms of oxygen make a molecule of
oxygen.
d. Proportions of elements in compounds vary
according to their source in nature.
e. Elements are found in compounds and
molecules.
Answer: d
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The minimum lethal concentration (MLC) is the lowest concentration of drug from which organisms fail to recover when removed from the drug.
Answer the following statement true (T) or false (F)
Describe how amniocentesis is used in the prenatal diagnosis of human genetic abnormalities. Then
compare and contrast the benefits and risks associated with amniocentesis and chorionic villus sampling. What will be an ideal response?
Groups of tissues that perform a specific body function make up:
A) the integument. B) an organ. C) a tissue. D) a gland. E) an organ system.
Which type of signal only operates over very short distances?
a. chemical b. tactile c. electrical d. visual e. acoustical