A collection of similarly specialized cells and any extracellular material they secrete and maintain describes

a. an organ.
b. a system.
c. a tissue.
d. organelles.


d

Biology & Microbiology

You might also like to view...

The region at which the RNA polymerase binds is the ________ region.

A. trailer B. promoter C. coding D. leader

Biology & Microbiology

Sharks are positively buoyant in seawater

Indicate whether the statement is true or false

Biology & Microbiology

Precancerous growths in the colon are known as ________; these can usually be removed surgically

Fill in the blank(s) with correct word

Biology & Microbiology

Valium, a prescription drug used to treat anxiety, works by

A) binding and activating acetylcholine receptors. B) preventing serotonin reuptake into neurons. C) increasing the release and availability of norepinephrine and dopamine at synapses. D) activating receptors for GABA.

Biology & Microbiology