The main causes of species extinction include:

_____ climate change
_____ introduced species
_____ ecosystem stability
_____ direct exploitation
_____ habitat loss
_____ range expansion


__X__ climate change
__X__ introduced species
_____ ecosystem stability
__X__ direct exploitation
__X__ habitat loss
_____ range expansion

Biology & Microbiology

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In which of the following animals would you NOT find an endoskeleton?

A. starfish B. sea sponge C. crocodile D. shark E. beetle

Biology & Microbiology

Oxidase-positive, glucose-positive (oxidatively) gram-negative bacilli that cannot grow on MacConkey agar include:

a. Pseudomonas. b. Vibrio. c. Stenotrophomonas. d. Sphingomonas.

Biology & Microbiology

The anterior pituitary hormone which has a generalized effect, having receptors on almost every cell in

the body, is

a. prolactin. b. growth hormone. c. gonadotropin. d. ADH. e. ACTH.

Biology & Microbiology

How many electrons are in the innermost

electron shell of a phosphorus atom?

a. 1 b. 2 c. 3 d. 5 e. 8

Biology & Microbiology