Answer:
Denature DNA; anneal primers; extend primers.
Explanation:
PCR (polymerase chain reaction) amplifies a small amount of sample DNA into multiple copies. The reaction mixture mainly consists of Taq polymerase enzyme, primers, sample DNA to be amplified, and deoxyribonucleotides (dNTPs). The first step is the denaturation of the DNA molecule into single strands and is facilitated by heat. This is followed by primer annealing to the single-stranded DNA molecules. Primers attach to the primer-binding site on each DNA strand which in turn now serves as a template for DNA synthesis catalyzed by Taq DNA polymerase. Extension of primers by the addition of dNTPs produces new DNA molecules.
D.
Mitosis is the division of body cells, which create exact copies.
Meiosis is the division of sex cells, which contain half the dna of the original cell. Each combination of DNA within the cells can be different due to how the chromosomes cross over during meiosis.
C is the answer. There are single-celled organisms that are considered a living thing. The others are all true about the cell.
Hoped this helped.
~Bob Ross®
It is called being drought-resistant
Answer:
B. organism
Explanation:
A. organ- it's the wrong answer because organs are what make up the organ system.
B. organism- it's the right answer because they contain organ systems. An example includes humans; organisms that have many organ systems like the digestive system and the endocrine system.
C. cell- it's the wrong answer because they are the basic unit of life. They form tissues, which in turn form organs.
D. tissues- it's the wrong answer because they are made up of cells and form organs.