Chloroplasts contain numerous structures called grana, each of which is a stack of

a. stroma.
b. mitochondria.
c. ribosomes.
d. thylakoids.


Answer: d. thylakoids.

Biology & Microbiology

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All the following factors affect the attenuation of light in water, except

A) phytoplankton. B) water itself. C) intensity of light. D) dissolved substances.

Biology & Microbiology

The pH of pure water is ________ because ________.

a. 7.0; water dissociates an equal number of H+ ions and OH- ions b. 14.0; water dissociates and more OH- ions are formed because there are more hydrogen atoms in water c. 1.0; water dissociates and more H+ ions are formed since hydrogen is smaller and can separate from the oxygen easily d. 7.0; there are no ions formed in pure water e. acidic; there are more H+ ions than OH- ions present

Biology & Microbiology

Were all of your transfers in class successful?

What will be an ideal response?

Biology & Microbiology

For over ________ years, dinosaurs dominated the face of the earth.

A. 1 million B. 10 million C. 150 million D. 10 thousand E. 50 million

Biology & Microbiology