Which one of the following is entirely located within the central nervous system?
A. effector
B. sensory neuron
C. motor neuron
D. sensory receptor
E. interneuron
Answer: E
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Wings of birds and butterflies have similar functions, but different evolutionary origins. They are:
A. physiological structures. B. homologous structures. C. analogous structures. D. phylogenetic structures.
Where does fertilization of the egg normally occur?
A. abdominal cavity B. ovary C. vagina D. oviduct E. fimbria
Which of the following is NOT a contributing factor
in species extinction? a. habitat loss b. overharvesting c. habitat fragmentation d. conservation biology e. illegal wildlife trading
________ is the interaction between the products of two genes in which one of the genes modifies the phenotypic expression produced by the other.
Fill in the blank(s) with the appropriate word(s).