What term refers to clusters of bacterial genes that are under the control of a single regulatory region?

A) autotroph B) attenuation C) allosteric D) operon E) prototroph


Answer: D

Biology & Microbiology

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If one compares the forearm of a human, dog, bird, and whale and finds that they indicate common ancestry, what would we call these structures?

a. vestigial structures b. archetype features c. homologous structures d. ancestral forms

Biology & Microbiology

The boreal forest, or taiga, is characterized by which of the following dominant plants?

a. palms b. deciduous trees c. grasses d. conifers

Biology & Microbiology

Clay is considered a possible site for early polymerization because it binds organic monomers and

contains zinc and iron ions that may have functioned as ATP, _______________ Indicate whether the statement is true or false.

Biology & Microbiology

Occasionally, chromosomes fail to separate during meiosis, leading to daughter cells that have an abnormal number of chromosomes. This phenomenon is called

A. nondisjunction. B. epistasis. C. pleiotropy. D. chromosome inactivation. E. crossing over.

Biology & Microbiology