The ability of certain bacterial cells to take on different cell shapes is known as

A positive allosteric effector will ________ the activity of an enzyme while a negative effector will ________ the activity.

Fill in the blank(s) with the appropriate word(s).

Many algal species have life cycles consisting of alternating haploid and diploid generations. The most

common life cycle in green algae consists of organisms that are

a. unicellular in the haploid stage and multicellular in the diploid stage. b. multicellular in the haploid stage and unicellular in the diploid stage. c. unicellular in both the haploid and diploid stages. d. multicellular in both the haploid and diploid stages. e. colonial in both the haploid and diploid stages.

Which is a characteristic of retrotransposons, but not of DNA transposons?

A) include a gene that encodes reverse transcriptase B) may be present in a genome from one to millions of times C) found only in humans D) may not have a function in their host E) have short DNA sequences that are inverted repeats of each other on the ends

A unique feature of the diaphragm is that it is_____

a. the only smooth muscle in the human body b. the only smooth muscle that can be voluntarily controlled c. only found in humans d. the only skeletal muscle that is under involuntary control e. easily replaceable