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.


(c) a tissue.

Biology & Microbiology

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Why are valves important in veins?

What will be an ideal response?

Biology & Microbiology

The scientific study of prehistoric humans and their relatives is most accurately called ____

a. paleoanthropology b. paleobiology c. paleontology d. paleoecology e. paleopsychology

Biology & Microbiology

“Perception” differs from “sensation” when referring

to a stimulus in a. the type of receptor stimulated. b. understanding the significance of the stimulus. c. the number of receptors that depolarize. d. feeling exactly what is happening at the site. e. responding to the stimulus.

Biology & Microbiology

The plant cell organelle most analogous to the animal cell endosome is the

A) provacuole. B) lysosome. C) peroxisome. D) glyoxysome. E) None of the above are analogous.

Biology & Microbiology