Which type of neuron directly stimulates a muscle or gland?
a. afferent neurons only
b. efferent neurons only
c. interneurons
d. afferent and efferent neurons
e. afferent neurons and interneurons
ANSWER: b
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A. 0% B. 10% C. 28% D. 44% E. 78%
In genetics, a chi-square test can be used to determine ____
a. whether an organism with a dominant phenotype is homozygous or heterozygous b. whether an allele exhibits complete or incomplete dominance
c. what the predicted outcome of a dihybrid cross will be d. how closely actual results of a cross match the expected results e. whether a trait is determined by one gene or many genes
Which of the following tissues covers the body surfaces, lines the body cavities and organs, and forms glands?
A) muscle B) nervous C) epithelial D) connective
Which of the following is not present in a nucleotide?
A. phosphate B. nitrogenous base C. an R group D. five-ring sugar E. a pentose