Various forms of the same gene are called
a. genotypes.
b. alleles.
c. somatic.
d. recessive.
e. phenotypes
B
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A homeotic gene regulates _____
a. where body parts form c. secondary sexual traits b. milk production d. sperm formation
Which one of the following statements accurately reflects the nature of mature communities?
A) Mature communities have more consumers than producers, because the producers are so efficient. B) Mature communities develop very quickly. C) Succession begins once a mature community has been established. D) Mature communities are so well established that when disturbed, they quickly recover. E) Mature communities are the most efficient in terms of energy utilization and exhibit the greatest species diversity.
The chemical differences between one amino acid and another is due to which of the following?
a) Amino group b) Carboxyl group c) R group d) Peptide bond e) Carbon atoms
What type of regulatory transcription factor binds DNA and increases the transcription of a gene?
A. an activator exerting negative control B. an activator exerting positive control C. a repressor exerting negative control D. a combination of both a repressor and activator exerting negative control E. a repressor exerting positive control