The measure of the light-bending ability of a medium is the
a) illumination.
b) magnification.
c) refractive index.
d) resolution.
Ans: c) refractive index.
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What could you use to measure metabolic rate in an animal?
A. CO? inexhalations B. Amount of food eaten C. The reactants or products of cellular respiration D. All of these are true
What type of reproductive isolating mechanism is described by a situation in which female fireflies mate only with males who emit light in a particular pattern?
A) habitat isolation B) temporal isolation C) mechanical isolation D) behavioral isolation
A child has a history of recurring serious bacterial infections. A blood sample shows lymphocyte levels are a little below normal, and no antibodies to the pathogens are detected in serologic tests. Based on this information, which of the following is the likeliest diagnosis for this child?
A) Bruton-type agammaglobulinemia B) Grave's disease C) severe combined immune deficiency (SCID) D) systemic lupus erythematosus (SLE) E) hemolytic disease of the newborn
The selection coefficient describes:
a. the value of an allele after selection. b. how many individuals survive to reproduction. c. genotype relative to an alternative genotype. d. the change in allele frequencies due to direct selection. e. the degree of dominance of one allele relative to an alternative allele.