What is the animal in the accompanying figure?

a. mosasaur
b. plesiosaur
c. pterosaur
d. thecodont
e. ichthyosaur


e

Biology & Microbiology

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Which of the following systems is the most stable in terms of species composition and distribution?

A. populations B. communities C. ecosystems D. biomes E. trophic pyramids

Biology & Microbiology

Based on molecular analyses, scientists now believe the domestication of the closest relatives of modern dogs began

between ____ years ago.

a. 800 and 1,200 b. 1,000 and 3,000 c. 4,000 and 8,000

d. 9,000 and 12,000 e. 18,800 and 32,100

Biology & Microbiology

The region of the mantle below the crust is called:

a. the asthenosphere. b. the mantle. c. the lithosphere. d. the outer core.

Biology & Microbiology

What is the surgical removal of cells, tissue, or fluid that will be analyzed for cancerous cells?

What will be an ideal response?

Biology & Microbiology