Which characteristic do most plants have in common?
A. they are unicellular
B. they are prokaryotic
C. they produce seeds
D. they are autotrophic
D. they are autotrophic
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Which of the following is NOT a characteristic of seeds?
A. They contain endosperm. B. They have an embryo. C. They may differ in amount of water content. D. They usually vary in size. E. They usually have about the same amount of water.
Place the following events of mitosis in the correct order.
I. Sister chromatids align on the metaphase plate. II. The cleavage furrow forms. III. The nuclear membrane breaks up. IV. Sister chromatids condense. V. Sister chromatids separate. A. I, II, III, IV, V B. III, IV, I, V, II C. IV, III, I, V, II D. III, II, I, IV, V E. IV, I, III, V, II
Fructose and glucose are
a. isotopes. b. monosaccharides. c. disaccharides. d. six-carbon sugars. e. monosaccharides and six-carbon sugars.
Gases such as nitrous oxide and carbon dioxide are called greenhouse gases because they
A) block sunlight from reaching Earth. B) block specific wavelengths of sunlight from penetrating. C) permit sunlight to enter but trap the heat energy in the atmosphere. D) block both sunlight and heat energy from penetrating the atmosphere. E) stimulate photosynthesis in most plants.