The pistil of a flower is best described as:
A. a structure to defend against insects
B. a single carpel or group of fused carpels
C. a place where pollen is produced
D. a grouping of filaments
E. a place for sperm to be produced
B. a single carpel or group of fused carpels
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What types of amino acids are most responsible for the binding of DNA to histones?
A. Hydrophobic amino acids B. Polar amino acids C. Positively charged amino acids D. Negatively charged amino acids
A population that is in genetic equilibrium is said to ____
a. have an equal number of homozygotes as heterozygotes for a given trait b. deviate from the Hardy-Weinberg law c. require genetic testing for estimation of allele frequencies d. lose genetic variation with each generation e. have an allele or alleles that remain constant generation to generation
If the Tn10 transposon is used to mutagenize a bacterium for the purpose of creating a mutation in the his operon, what would be the most appropriate selection media?
A) rich media that contains all of the amino acids supplemented with tetracycline B) minimal media supplemented only with histidine C) minimal media supplemented with tetracycline and histidine D) minimal media supplemented with tetracycline alone
If your hypothesis is rejected, then:
A) your experiment was a success. B) your experiment was poorly designed. C) your data is only half as reliable. D) you should change the level of statistical significance until your hypothesis is accepted. E) you may still have learned something important about the system you were testing.