The eye is a warm, moist environment favored by many harmful bacteria. Nevertheless, eye infections are relatively rare. Why is this?

A) The enzyme tearase inhibits bacterial growth.
B) Tears contain the antibacterial enzyme lysozyme.
C) The eyes are constantly exposed to UV light, which inhibits bacterial growth.
D) Antibodies, particularly IgM, are secreted in abundance in the tears.


B

Biology & Microbiology

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Greenhouse gases

A) such as CO2, CH4, and N2O trap infrared radiation and heat the Earth. B) such as CO2 increase plant and animal growth, resulting in more heat production on Earth. C) such as CO2 and O3 (ozone) interact with UV light and heat the Earth. D) such as CO2, CH4, and N2O destroy O3 (ozone) and allow more UV light to enter the atmosphere, thus increasing the temperature of the Earth's surface.

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A behavior that depends on experience has been ____

Fill in the blank with the appropriate word.

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Answer the question using the accompanying figure.Which number identifies the structure that transmits auditory

signals to the brain?

a. 2 b. 6 c. 7 d. 8 e. 9

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The electron transport system is a series of ________ reactions

Fill in the blank(s) with the appropriate word(s).

Biology & Microbiology