Which of the following is the most advanced nervous
system?
a. a diffuse system with scattered neurons
b. an asymmetrical system
c. a radially symmetrical system
d. a system with paired nerves, paired sensory
structures, and paired brain centers
e. a nerve net
Answer: d
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Which of the following terms DOES NOT describe a basic type of protistan nutrition?
A. phagotrophic B. eutrophic C. osmotrophic D. autotrophic E. mixotrophic
Prion diseases are always fatal and there is no treatment
a. True b. False Indicate whether the statement is true or false
Phototropins repress transcription of a gene that causes auxin efflux carriers to be distributed evenly around the cell. What happens next, when phototropins are released as a response to a plant cell being exposed to a directional light source?
a. Auxin efflux carriers become positioned on the sunny side of the plant. b. Auxin efflux carriers become positioned on the shady side of the plant. c. Auxin buildup occurs within the cells, but in no set pattern. d. Auxin efflux carriers become positioned on the shady side of the plant and the plant bends towards the light. e. Auxin efflux carriers become positioned on the sunny side of the plant and the plant bends towards the shade.
Which is NOT a correct association of brain structures and functions?
Select one: a. midbrain—reflex centers for visual, auditory, and tactile responses b. cerebellum—coordinates smooth and coordinated motions c. cerebrum—higher thought processes, including learning, memory, and speech d. pons—regulates breathing rate e. thalamus—regulates heartbeat and blood pressure