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Lady bird [3.3K]
3 years ago
5

Chemical reactions change what and produce what?

Biology
2 answers:
Sav [38]3 years ago
8 0

Chemical reactions changes substances and produces a new different substance.

Explanation:

By the process of chemical reactions, many substances are converted or changed into different compounds as a product. The reactants that cause the change are changed into products of the reaction. They are usually chemical compounds. The reactions organize the atoms of a compound and create other substances.

Examples of chemical reactions are- burning of fuel, pottery, cheese and wine making etc. They are different from physical changes like- ice melting and becoming water.

Dmitry [639]3 years ago
5 0

Answer:

chemical reactions change reactant and produce new substance called products.

Explanation:

chemical reaction is a change which will produce a new substance. ( while physical reaction does not produce a new substance.

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Answer:

A

Explanation:

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2 years ago
What are they five steps of cloning?
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Hi

Below are five major steps of DNA or gene cloning:

1: You chose the gene or specific piece of DNA you need to clone and cut the gene with restriction enzymes from the source organism.

2: You need to choose a vector for the process of cloning and you will cut the vector with same restriction enzymes through which you have cut your target DNA sequence to be inserted into the vector.

3: You place the target gene into the vector and join or seal the gene with vector by using an enzyme called DNA ligase.

4: You introduce the vector with your target gene into a suitable host organism such as yeast or bacteria through the process of Transformation. In this process host organism takes up the vector containing your target gene and starts replicating the target DNA along with their own DNA and thus creating millions of copies of target gene .

5: In the last step, the DNA or target gene is isolated from host organism and purified and is ready to be used since its quantity has been enormously increased through the process of cloning.

The cloning is also called as recombinant DNA technology and is the main process that is being used in the production of insulin for diabetes patients. You can see below image for better understanding.

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6 0
3 years ago
Explain how a paleontologist might use absolute dating techniques to determine the age of a fossil.
miv72 [106K]
A paleontologist can use radiometric dating (also known as carbon dating), to determine the age of a fossil. They do this by measuring the decay of isotopes in either the fossil itself or the rocks associated with it. A carbon-14 isotope takes about<span> 5,730 years to halfway decay, knowing this information paleontologists can date a fossil by how long the fossil has been decaying with the use of special tools.
http://hyperphysics.phy-astr.gsu.edu/hbase/Nuclear/cardat.html
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