Imagine that several atoms bond to form a carbohydrate, creating a more orderly system. Which of the following statements is true regarding the universe after this carbohydrate forms?
a. The energy of the universe increases.
b. The energy of the universe decreases.
c. The entropy of the universe increases.
d. The entropy of the universe decreases.
e. Both the energy and entropy of the universe increases.
Ans: c. The entropy of the universe increases.
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The soils in which most plants do best are
a. mixtures of mainly sand and silt. b. sandy soils. c. soils made mostly of humus. d. clay soils. e. loams.
The constant region of a light chain is indicated by number
a. 1. b. 2. c. 3. d. 4. e. 5.
When the DNA in a cell is uncoiled and spread throughout the nucleus, it is called
A) a chromosome. B) a centromere. C) chromatin. D) a chromatid.
A eukaryotic cell organelle is found to have its own DNA and to make some of its own ribosomes. It also can make some protein without the help of DNA in the cell's nucleus. Propose an explanation for the origin of this organelle
A) intracellular evolution from latent bacterial DNA B) symbiotic merger of bacteria into a eukaryotic cell with the bacterial cell becoming the organelle C) symbiotic merger of two bacteria cells; one becoming the nucleus, the other becoming the organelle D) viral transmission of DNA from a bacterium to a eukaryotic cell