Mutualism is a relationship
A. that provides benefits for both members, sometimes to the point that one cannot live without the other.
B. where only one member derives benefit from the other.
C. where one member of the relationship may kill the other.
D. where one member of the relationship benefits without hurting the other.
E. where it is difficult to prove the benefits or disadvantages one member of the relationship may provide for the other.
Answer: A
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Molecular clocks are usually calibrated based on
A. guesses about the rates of mutations in a particular gene. B. observed rates of mutation in a particular gene. C. the first shared common ancestor for species known from the fossil record. D. comparing the gene to similar genes in other kingdoms. E. the date when two species diverged from a common ancestor.
Your parents are both heterozygous for the recessive disorder phenylketonuria (PKU). What is the probability that you
will have the disorder?
a. 25% b. 50% c. 75%
d. 100% e. 25% if your three siblings are healthy; 75% if your siblings also have the disorder
The largest lymphatic duct, which runs along the anterior vertebral column, is the ______.
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Name one of the botanists who, in 1900, rediscovered the work of Gregor Mendel
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