Why is important to maintain healthy ecosystems.

    Healthy ecosystems purify our water, clean our air, maintain the soil, regulate the climate, recycle nutrients, and provide us with food. They provide raw materials and resources that can be made into medicines and other things. Biodiversity is the key indicator of the health of an ecosystem.

answer; //the above statement is (false);

c.) polymerase chain reaction

- "unlike the original dna fingerprinting method, dna profiling does not use restriction enzymes to cut the dna. instead it uses the polymerase chain reaction (pcr)? to produce many copies of specific str sequences. pcr is an automated procedure that generates lots of copies of a specific sequence of dna."