Answer:
<h2>They provide a 3’ end for the DNA polymerase.</h2>
Explanation:
Polymerase chain reaction (PCR) is an in-vitro method to making copies of a specific DNA sample in a very short time.
Polymerase chain reaction was invented by Kary Mullis in 1983.
Primers are specific to the DNA which we want to replicate and they bind to the specific sequence which is complementary to it. Primers provide a 3’ end for the DNA polymerase.
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The answer is
<span>B.They help produce plasma cells.
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❖ Watson and Crick were most well known for the discovery of the double helix. The double helix is the twisted ladder of DNA.
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D is the answer cause
A genome is an organism's complete set of DNA including all of its genes. Each genome contains all of the information needed to build and maintain that organism. This is the largest in the given options.
Chromosomes are the threadlike structures located inside the nucleus of animal and plant cells.
The building blocks of nucleic acids are the nucleotides.
A gene is the basic physical and functional unit of heredity. Genes are made up of DNA.
Thus, the correct answer is option (D), 'Genome, chromosome, gene, nucleotide'.
Answer:
Controlled Investigation
Field Investigation
Explanation: In a controlled experiment, the scientist has total control over the environmental conditions. The temperature, humidity, amount of light, amount of noise, materials, etc. can all be controlled and monitored by the scientist throughout the investigation.
A field investigation involves observing and measuring plants and animals (including people) in their natural habitat or environment without changing, harming, or altering the setting or any part of the test subjects. Like in a controlled experiment, the scientist chooses to observe and measure how one change (IV) has a measurable effect (DV) on something else.