The brains of female zebra finches lack the hormonal influences that occur in the brains of males. As a result, what
changes are seen in the female brains?
a. auditory processing centers are especially well-developed in females
b. more neurons are produced in the higher vocal center
c. increased transcription of 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
ANSWER: d
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A. RNA polymerase B. promoter elements C. enhancer elements D. transposable elements E. topoisomerase
Both Staphylococcus aureus and Streptococcus pyogenes have fibronectin-binding proteins
Indicate whether this statement is TRUE or FALSE.
Two species of birds compete for the same size of seed eventually develop different beak sizes that allow them to compete for different sizes of seeds. What has occurred?
a. competitive exclusion only b. character displacement only c. directional selection only d. competitive exclusion and character displacement e. directional selection and character displacement
Alterations to DNA sites such as promoters and operators can act
A) only in cis. B) only in trans. C) either in trans or in cis. D) These terms apply only to posttranscriptional regulation.