Desiccation, a time-honored method of preserving food, is effective because the
A. heat of the process kills microbes.
B. freezing step of the process kills microbes.
C. salt concentration is too low to support metabolic function.
D. UV light used in the process of sun drying penetrates effectively.
E. water content is too low to support metabolic function.
Answer: E
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While analyzing data from the prior week, a chemist determines that she has discovered a new type of atom. While the atom has the same number of protons as nitrogen, the number of neutrons is different. What has she discovered?
a. an isomer b. an ion c. an isotope d. a compound
Most of the energy for active transport is provided by
a. glucose. b. sodium. c. calcium. d. ATP. e. ADP.
Photosynthetic, nonmotile organisms having cell walls belong to the Kingdom
A. Plantae. B. Fungi. C. Protista. D. Animalia.
Answer the following questions true (T) or false (F)
1. If something is oxidized, it loses electrons. 2. The human genome is estimated to include 20,000 to 25,000 genes. 3. Anaphase is characterized by the separation of sister chromatids.