Which of the following represents a challenge toxicologists face when trying to detect and identify a drug?
a. Almost 100% of the drug will be excreted in the urine within 6 hours.
b. The drug the subject ingested has metabolized into other substances.
c. Extremely large concentrations of drugs are involved.
d. They don’t get paid if they don’t find drugs in the subject’s body.

Kara has a plant that produces either purple or white flowers. she crosses a plant that has two recessive alleles for white flowers with a plant that has two dominant alleles for purple flowers. which result would be true of all of the offspring? a) all of the offspring would have two recessive alleles and white flowers. b) all of the offspring would have two dominant alleles and purple flowers. c) all of the offspring would have one recessive allele, one dominant allele, and white flowers. d) all of the offspring would have one recessive allele, one dominant allele, and purple flowers