Atoms in which the number of electrons does not equal the number of protons are known as:

A. valences.
B. ions.
C. isotopes.
D. isomers.


B

Biology & Microbiology

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Which of the following is the highest (or most complex) level of structure for genetic material?

A. nucleotide. B. double helix. C. DNA. D. gene. E. chromosome.

Biology & Microbiology

Which of the following is NOT true about

fossil fuels?

a. they currently are not cost effective b. they are made from non-fossilized organic matter c. they include oils, gases, and alcohols mainly from plants d. they add more carbon dioxide to the atmosphere e. more than one of these is not true

Biology & Microbiology

Match the reactant in gluconeogenesis on the left with the appropriate enzyme on the right

A) fructose-1,6-bisphosphatase B) phosphoglyceromutase C) pyruvate kinase D) oxaloacetate kinase E) hexokinase F) glucose-6-phosphatase G) aldolase H) pyruvate carboxylase I) phosphoenolpyruvate carboxykinase 1) pyruvate 2) oxaloacetate 3) fructose-1,6-bisphosphate 4) glucose-6-phosphate 5) 2-phosphoglycerate

Biology & Microbiology

Bees may pick up pollen of one species on a certain place on their bodies; if this area does not come into contact with the receptive structures of the flowers of another plant species, the pollen is not transferred. This is an example of

A. ecological isolation. B. temporal isolation. C. geographical isolation. D. mechanical isolation.

Biology & Microbiology