The brains of female zebra finches lack the hormonal influences that occur in the brains of males
What changes are seen in the female brains as a result?
a. Auditory processing centers are especially well-developed in females.
b. More neurons are produced in the higher vocal center.
c. Transcription is boosted in genes whose products are involved in memory retention.
d. The number of neurons in the higher vocal center declines.
e. Octopamine levels increase, stimulating neural transmissions.
D
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You make a phospholipid bilayer with short, saturated hydrocarbon tails. You measure the permeability of this membrane to oxygen. You then double the length of the hydrocarbon tails and remeasure membrane permeability. You then double the length of the hydrocarbon tails again and make a third measurement of membrane permeability. You graph membrane permeability as a function of hydrocarbon tail length. Which of the accompanying graphs best represents the data you expect?
a.) Horizontal line b.) Positive slope c.) Bell shape d.) Negative slope
Both mitochondria and chloroplasts __________.
Fill in the blank(s) with the appropriate word(s).
What behavior did Eric Kandel and his colleagues focus on in their studies of learning in Aplysia?
A. the gill-withdrawal reflex B. feeding C. sexual behavior D. locomotion E. aggression
The subatomic particles that surround the nucleus are the
A. protons. B. protons and neutrons. C. protons and electrons. D. electrons. E. neutrons.