Which of the following persons is MOST likely to experience chronic stress?
A. Zachary's father died of a heart attack three weeks ago.
B. Junko has been in labor for 10 hours so far.
C. Wen-Ho is stuck on a Los Angeles freeway at rush hour while visiting his aunt for the week.
D. Paulette is shy and attending a new high school.
Answer: D. Paulette is shy and attending a new high school.
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When one plant is shaded by another, why is the ratio of far-red to red light increased compared to an unshaded plant?
A. Phytochrome in the taller plant absorbs most of the red light. B. Auxin absorbs mostly far-red light. C. As light passes through the leaves of the taller plant, most of the red light is absorbed by chlorophyll. D. Far-red light mostly reflects off the surface of the soil while red light is mostly absorbed. E. Shade is enriched in far-red wavelengths of light.
The change in the chromosome depicted between the top and the bottom in the accompanying figure represents a(n)
____.
a. inversion b. duplication c. reciprocal translocation d. deletion e. Philadelphia chromosome
The peppered moths showed an example of ___________(type of natural) selection when their wings showed different colorations to match the trees in their habitat.
Fill in the blank(s) with the appropriate word(s).
How does caffeine work?
A. interferes with or decreases the action of a neurotransmitter B. promote the action of a neurotransmitter C. increases the amount of neurotransmitter at a synapse D. replace or mimic a neuromodulator E. replace or mimic a neurotransmitter