Which level of biological organization is composed of tissues?


(a). organism
(b). organ system
(c). organ
(d). cell
(e). molecules


(c). organ

Biology & Microbiology

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Which of the following is a Wnt pathway membrane protein?

A. Wnt B. Dsh C. frizzled D. Hedgehog

Biology & Microbiology

The primary reservoir of the Mycobacterium responsible for leprosy is:

a. infected humans. b. infected animals. c. contaminated food. d. contaminated objects.

Biology & Microbiology

Which of the following is NOT a characteristic

of Australopithecus afarensis?

a. chimpanzee sized brain b. narrow pelvis c. S-shaped backbone d. opening at the base of the skull e. more than one of these is NOT a characteristic of A.afarensis

Biology & Microbiology

When a neuron is at rest, what maintains the high concentration gradients of potassium ions inside the cell and sodium ions outside the cell?

A) diffusion B) osmosis C) active transport D) ion channels

Biology & Microbiology