The axon branches of a typical neuron terminate at structures called
A) synapses.
B) boutons.
C) glia.
D) nodes of Ranvier.
E) myelin sheath.
B) boutons.
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The evolution of petals through the AP3 gene is best explained by
A. a new gene mutation. B. the modification of an existing gene for a new function. C. homoplastic convergence. D. gene duplication and divergence. E. conserved genes.
There is an autosomal gene that controls baldness, and its expression is sex-influenced. The gene for
baldness (B) is dominant in males but recessive in females. In females, the allele B1 for nonbaldness is dominant over the gene for baldness. If heterozygous, nonbald woman marries a nonbald man, what will be the appearance of their children? Work out the possibilities for each sex. What will be an ideal response?
The walled asci contain
a. eight diploid nuclei b. eight haploid nuclei c. many multinucleate conidia d. an egg and a sperm e. a zygote
Which of the following monomers is not paired correctly?
A) nucleotides-nucleic acids B) amino acids-proteins C) glucose-carbohydrates D) All of these are paired properly.