Identify three greenhouse gases and briefly explain how these gases are contributing to global warming. What will be an ideal response?
Although carbon dioxide is the major greenhouse gas, trace gases such as methane, surface
ozone, nitrous oxide, and CFCs also contribute to global warming. These gases absorb
infrared radiation in the atmosphere, and this absorption slows the flow of heat into space,
thus warming the lower atmosphere.
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Soil protists often utilize bacteria as a nutrient source.
Answer the following statement true (T) or false (F)
Which of the following is NOT true of ecosystems?
a. Although they may include many different species, many features of ecosystem structure and function are alike. b. Autotrophs secure energy and nutrients that are then used by heterotrophs. c. Energy cycles and minerals flow through ecosystems. d. Many different food chains are represented in most ecosystems. e. Ecosystems are characterized by relatively few trophic levels
There are how many different types of amino acids?
a. 5 b. 10 c. 15 d. 20 e. 50
Which one of the following is a function of proteins?
a. energy storage b. enzymatic activity c. genetic coding d. insulation