Carbon dioxide and other greenhouse gases cause Earth's temperature to increase by
A) reducing photosynthetic rates.
B) absorbing heat energy and holding it close to Earth.
C) increasing the amount of radiation from Earth's surface.
D) increasing plant respiration.
E) allowing greater transmission of incoming solar radiation.
B
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Which of the following is a cure for mumps?
A) a vaccine B) an antibiotic C) host antibodies D) an antiviral
Actinomycete spores are usually formed on ________ mycelia.
Fill in the blank(s) with the appropriate word(s).
Biotechnology involves the
a. use of microorganisms to make desired products. b. use of animal cells to make vaccines. c. development of disease-resistant crop plants. d. use of microorganisms to make desired products and the use of animal cells to make vaccines. e. use of microorganisms to make desired products, the use of animal cells to make vaccines, and the development of disease-resistanct crop plants.
Which substance will help in seed germination and indicates to the plant that the stem must elongate to reach the light?
What will be an ideal response?