Hola Chicas Busco novia de 13, 14 o 15 que tenga redes sociales, manden fotos en las respuesta :)

Environmental differences within ecosystems are generally caused by

In 2001, records showed that local stocks of fish were down worldwide. yet, records of harvests indicated that fish were being taken at records rates. what was actually happening?

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