Which domains contain organisms that lack a membrane-bound nucleus?

a. Archaea and Bacteria
b. Fungi and Protozoa
c. Archaea and Protozoa
d. Fungi and Bacteria
e. None of the above


Archaea and Bacteria

Biology & Microbiology

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The ratio of the size of the image seen with the microscope to the actual size of the object is called:a

magnification. b. resolution. c. resolving power. d. centrifugation. e. fractionation.

Biology & Microbiology

Diabetes insipidus results from an insufficient production of:

a. ADH. b. aldosterone. c. angiotensin II. d. ANP. e. renin.

Biology & Microbiology

The capsid is composed of protein subunits called

A) spikes B) protomers C) virions D) capsomeres

Biology & Microbiology

Which of the following is an example of an exotoxin?

A) neurotoxin B) coagulase C) lipid A D) streptokinase E) collagenase

Biology & Microbiology