Which of the following is NOT characteristic
of sensation?
a. Some sensory receptors are activated only
by chemicals.
b. Nerve impulses mediating each of the
senses are essentially the same.
c. Sensory neuron activity follows the all-ornone
law.
d. All organisms use the same sense organs to
perceive their environments.
e. All sensory receptors convert stimulus
energy into action potentials
D
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Exchange of genetic material among different species is called
A. homolgous gene exchange. B. horizontal gene transfer. C. exon shuffling. D. genetic recombination. E. exon shuffling and or genetic recombination.
The Venus flytrap receives its nitrogen by
trapping and digesting insects. This is a type of
a. commensalism. b. mutualism. c. competition. d. predation. e. parasitism.
The animals pictured here are
1.chelicerates
2.myriapods
3.crustaceans
4.arachnids
Plant stems then toward a light source as a result of increased
A. Chlorophyll synthesis on the side of the stem near the light source B. Cell division on the side of the stem near the light source C. Cell division on the side of the stem away from the light source D. Cell elongation on the side of the stem near the light source E. Cell elongation on the side of the stem away from the light source