Carbon has 4 valence electrons and oxygen has 6 . Carbon dioxide would contain _____

A. four hydrogen bonds
B. two single covalent bonds
C. two double covalent bonds
D. one single covalent bond


C

Biology & Microbiology

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Which statement describes the role of photosynthesis in an ecosystem?

a. Primary producers convert chemical energy to light energy. b. Primary consumers rely directly on light energy. c. Primary producers convert light energy to chemical energy as a service to the ecosystem, not for their own gain. d. Primary consumers rely on primary producers to make light energy available in a usable form. e. Primary producers are heterotrophs and thus make no contribution to the flow of energy into the ecosystem.

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The ____ fungi rely on extracellular digestion

and absorption of energy-rich substances from living organisms. a. chemosynthetic b. saprobic c. parasitic d. plasmodial e. autotrophic

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cohesion

What will be an ideal response?

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  Based on the phylogeny shown, the outgroup would be species

A. 1 B. 2 C. 3 D. 4 E. 5

Biology & Microbiology