Describe at least 3 lines of evidence that support the theory of seafloor spreading and continental drift
What will be an ideal response?
The most obvious evidence in support of seafloor spreading and continental drift is the shape of present-day continents, which implies that they once fit together like pieces of a puzzle. In addition, if new seafloor were being created from solidified magma at seafloor spreading centers, then one would expect this new seafloor to have unique characteristics compared to older seafloor away from seafloor spreading centers. Some of these unique characteristics include warmer temperatures than seafloor that is farther away from spreading centers, younger rocks near seafloor spreading centers, and rocks that are covered by less sediment closer to seafloor spreading centers.
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Which statement about the structure of proteins is false?
A) Proteins are made of long strings of 20 different common amino acids in different orders. B) The order of amino acids in a polypeptide determines the three-dimensional shape of the folded molecule. C) The chemical properties of each amino acid are determined by the amino acid's side chain. D) Most proteins consist of two amino acid polymers attached together by hydrogen bonding.
One surprise from comparative genome projects is that
A) all species examined so far have the same genes. B) we do not know the function of a great many genes. C) small organisms can have large genomes. D) large organisms can have small genomes.
What would a Lod score of 3.2 tell you about genetic linkage? What information does the ? value tell you?
What will be an ideal response?
The collection of a substance in an organism's body tissues that becomes more concentrated in organisms higher on a particular food chain is called
a) concentration b) smog c) pollution d) biological magnification