Scientific theories are of fundamental importance in science. Explain the difference between the term "theory" as
employed in science versus "theory" as employed in everyday language.
What will be an ideal response?
ANSWER: Scientific theories have withstood the test of time and have been extensively confirmed by
repeated experiments. The term as used in science has validity whereas in everyday context it
takes the form of an opinion or a guess.
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Describe the mutualistic relationship between chemolithotrophic bacteria and tube worms in hydrothermal vents
What will be an ideal response?
If Sry protein were injected into a genetic female fetus 6 weeks after conception, the fetus would develop into a genetic
a. female with ovaries. b. female with testes. c. female with neither testes nor ovaries. d. male with ovaries.
Independent assortment refers to the fact that
A. a cell will divide and produce various offspring regardless of whether any other cell is dividing. B. mitosis normally produces cells that are like each other and like the parent cell. C. the daughter cell that receives the maternal #1 chromosome will not necessarily receive the maternal #2. D. a crossover between two chromosomes will produce offspring unlike either parent.
Which of the following statements about gel-transfer hybridization (or Southern blotting) is false?
(a) This technique involves the transfer of DNA molecules from gel onto nitrocellulose paper or nylon paper. (b) In this technique, single-stranded DNA is separated by electrophoresis. (c) A labeled DNA probe binds to the DNA by hybridization. (d) The DNA that is separated on a gel is not labeled.