how do you know when a chemical reaction obeys a certain law is the law of multiple proportion law of constant composition, definite proportion, constant composition ​

Susan arnold is a 62 year old woman who has developed rheumatoid arthritis and is beginning to develop significant joint damage

What does polymerase chain reaction (pcr) do? o a. separates dna fragments by size o b. cuts a dna sample into fragments o c. provides an overall picture of a person's chromosomes o d. makes more copies of a sample of dna

Dan made the table shown to describe two different relationships between animals. organism interactions relationship a relationship b one organism lives inside the organism it feeds off no organism is harmed which of the following statements is most likely correct?