Red tide and extensive fish kills are caused by population blooms of ____

a. euglenoids
b. dinoflagellates
c. diatoms
d. ciliates
e. brown algae


ANSWER: b

Biology & Microbiology

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The topoisomerase DNA gyrase will introduce negative supercoils into DNA. What effect will this enzyme have on relaxed, covalently closed DNA?

A. The linking number will increase. B. The DNA will become overwound. C. The treated DNA will migrate farther in an agarose gel than the relaxed DNA. D. The linking number will become undefined. E. The relaxed DNA will migrate farther in an agarose gel than the treated DNA.

Biology & Microbiology

____________________ result from immunological hypersensitivity to what should be harmless substances

Fill in the blank(s) with correct word

Biology & Microbiology

During menopause:a

estrogen levels rise. b. menstruation ceases. c. many ova are released. d. women experience cold flashes. e. all of these are correct

Biology & Microbiology

Which term refers to the initial branches of the trachea that lead into each lung?

a. bronchioles b. alveoli c. pleura d. bronchi

Biology & Microbiology