Two molecules with identical molecular formulas but different structures are called
A. monomers.
B. dimers.
C. polymers.
D. isomers.
E. isotopes.
Answer: D
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Which of the following is not a tenet of the cell theory?
A) All organisms consist of one or more cells. B) All cells arise from preexisting cells. C) The cell is the basic unit of structure for all organisms. D) All cells have a membrane-bound nucleus. E) none of the above
An F1 individual resulting from a cross between a homozygous dominant parent and a homozygous recessive parent is
always ____.
a. heterozygous or homozygous dominant b. heterozygous or homozygous recessive c. homozygous dominant d. homozygous recessive e. heterozygous
The component of a neural signaling pathway in which messages are sorted and interpreted is called
a. a response. b. integration. c. transmission. d. reception. e. action.
Which term or terms best describe a plant that is growing taller with growth of its stems, leaves, and roots?
a. primary b. secondary c. primary, lateral meristem d. primary, apical meristem e. secondary, vascular cambium