Answer: I would go with B. Here’s why: An index fossil is usually easily recognizable, and underwent a wide geographic distribution. What leads me to believe B is the correct answer, is because it’s something that existed “ all over the world”.
I’m sorry I do not know what the answer is. Are you in forensic science? I’m making my 4 year plan, and I put that as one of science classes. If you are in that high school class can you provide any details on that class. If you know the answer to their question and the second spot is full, please comment under my question for them.
The answer is fixed interval
I hope that helped
The denaturation step in the polymerase chain reaction will be affected. As a result the DNA strands will not unwind and the DNA will not become single stranded.
<u>Explanation:</u><u>
</u>
Polymerase chain reaction is used to synthesize multiple copies of DNA. The technique in molecular biology uses thermal cycling which involves steps of heating and cooling. There are three important steps in PCR.
Nucleic acid denaturation is the first step. In this step the DNA is heated to about 90°c and this causes the denaturation of the DNA. Two strands of DNA get separated. The second step is annealing in which the strands are cooled to 55°c.
During annealing the primers stick to the complementary sites on the DNA to facilitate its replication. The third step is extension in which the temperature of the mixture is raised to 72°c. The tag polymerase will start working on the DNA strands and replicate them.
If the denaturation step is not performed the speration of double stranded DNA into single strands won’t take place.
The nucleus is the part of the cell, or organelle, that contains the genetic material and controls the cell's movement. It consists of the genetic material, the nucleoleus, and the nuclear membrane.
Nucleus- the nucleus controls all of the cells activities, including how the cell grows,develops,and divides.
