When Shakespeare wrote about the world as a stage
and each of us being players, he was unknowingly
referring to the biological concept of
a. succession.
b. the niche.
c. different habitats.
d. feeding levels.
e. interspecific competition.
Answer: b
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All of the following statements about initiation and transmission of action potentials in neurons are correct EXCEPT:
A. The rate of transmission of an action potential is directly related to the diameter of the axon. B. Information about the intensity of a stimulus is conveyed by changes in the size of the action potential generated. C. The resting potential is maintained by differential ion permeabilities and the sodium-potassium pump. D. Once initiated, local depolarizations stimulate a moving wave of depolarization down the axon. E. A stimulus to the neuron can either depolarize or hyperpolarize the neuronal membrane.
According to Wilhelm Stern's method of measurement, a ten-year-old child who is able to perform the mental tasks of a ten-year-old (but not of an eleven-year old) has an IQ of ____
a. 80 b. 90 c. 100 d. 110 e. 120
Which of the following is the function of the vestibular system?
a. transmission of auditory stimuli b. sinus in the skull that reduces mass c. detection of movement and balance d. sensing of the placement of the body’s limbs in space
Which of the following is true in the fern life cycle?
a. Gametophytes originate within and are dependent upon sporophytes b. Sporophytes originate within and are dependent upon gametophytes c. Both gametophytes and sporophytes are totally independent from each other and are equally dominant d. Gametophytes are free-living and photosynthetic, but are replaced by a dominant sporophyte generation e. Gametophytes are photosynthetic and partially independent from the sporophytes