Which of these methods is a relatively simple, quick, and cheap method of identifying, isolating, and copying segments of DNA code and thus is the most widely used procedure today?

DNA library construction

Nucleic acid hybridization

Polymerase chain reaction

In what for do plants utilize nitrogen? why do they need nitrogen?

Iguanas need to live in a habitat that is very warm, so the pet store warms their enclosures with "basking lights" which act as an artificial sun. describe how the three methods of thermal energy transfer may take place within the iguana's enclosure.

Ascientist separates a population of mice into two groups. what would most likely increase the rate of speciation in this population. a. teach the two groups different tricks b. allow the two groups to breed with each other c. put the two groups in different environment d. have the two groups live in identical ecosystems