In the carbon cycle, plants convert carbon dioxide from the air in to a. proteins
b. nitrogen
c. carbohydrates
d. nucleic acids​

Which blood cell spend most of their time in the lymphatic system?

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

What type of graph presents information about how often certain or traits occur?