During inhalation, the ____

a. external intercostal muscles relax
b. pressure in the lungs is less than atmospheric pressure
c. diaphragm moves upward and becomes more curved
d. chest cavity volume decreases
e. lung pressure increases


b

Biology & Microbiology

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Why do some leaves change color (red, yellow, orange, etc.) in the fall?

A. When leaves die, the chlorophyll molecules are no longer visible. B. Cold weather denatures the chlorophyll molecule, and it begins to reflect different colors. C. The chlorophyll molecule breaks down and other pigments now become visible. D. The chlorophyll molecule is modified to absorb different wavelengths of light.

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Which structure surrounds and protects the brain in all vertebrates?

a. pharynx b. neural crest c. oral hood d. notochord e. cranium

Biology & Microbiology

Vesicles that carry proteins from the rough ER to the Golgi apparatus bud off as _______ vesicles.

a. uncoated b. clathrin-coated c. COPI-coated d. COPII-coated

Biology & Microbiology

Technology is the __________________________.

(a). application of scientific knowledge for a practical purpose. (b). study of living organisms. (c). study of the interactions between living organisms and their environment. (d). application of common knowledge for a practical purpose. (e). application of laws to benefit society.

Biology & Microbiology