A motor neuron and the muscle cells it synapses with form a(n)
a. active site.
b. action potential.
c. motor unit.
d. cross bridge.
e. motor network.
C
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Diploid organisms use meiosis to produce haploid cells. Meiosis consists of how many rounds of nuclear division?
A. one B. two C. three D. four E. none of these
Genetic drift is the only way deleterious alleles are maintained in a population
a. true b. false
Alleles are described as ________
A) homologous chromosomes B) environmental factors that affect gene expression C) alternate versions of a gene D) alternate phenotypes
How might telomere length be affected in a cloned animal like "Dolly" the sheep?
A. Telomeres might be longer than normal B. Telomeres might be shorter than normal C. Telomeres might be of normal length D. No telomeres would be present