In an experiment described in a chemistry lab book, the directions state that after mixing two chemicals (A and B) and waiting 5 minutes that A will be oxidized. This means that
A. chemical A has lost electrons to chemical B.
B. chemical A has lost energy in the form of heat to chemical B.
C. chemical A has gained electrons from chemical B.
D. chemical A has gained energy in the form of heat from chemical B.
E. chemical A has reacted with oxygen.
Answer: A
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Which of the following is a characteristic of active transport? a. Only small nonpolar molecules are transported
b. Specific membrane proteins are required but no energy is needed. c. It is a passive process. d. Solute movement across the membrane is toward the side with the higher concentration.
The phenetic system is based primarily on:
a. known evolutionary relationships. b. fossil evidence. c. the number of shared characteristics. d. the number of ancestral characteristics. e. both ancestral and shared characteristics.
Water is transported vertically through the plant via the process of translocation
____________________ Indicate whether the statement is true or false.
Which prokaryotic nutritional group use organic substances for carbon and photons for energy?
A. Photoautotrophs B. Chemoautotrophs C. Photoheterotrophs D. Chemoheterotrophs E. Methanoheterotrophs