A group of students combined different substances together during several experiments. Their observations are recorded on the chart below. 1. A blue liquid and a yellow liquid were mixed and it turned green

2. A solid substance dissolved in a clear liquid

3. Two room temperature liquids were mixed and the temperature increased

4. Two different liquids were mixed and began to separate and layer in a beaker

In which experiment did a chemical reaction likely occur?

1
2
3
4?

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."

the answer is c.mitochondria. glad to .

the correct answer is 4) heat and pressure

metamorphic rocks arise from transformation of existing rocks types, in a process called metamorphism. during metamorphism the original rock(prolith) change into metamorphic rock by heating (150-200c) and pressure of more than 1000 bar. the original rock can be sedimentary, igneous, or existing metamorphic rock.