Are there any answer choices?
Hello,
The answer is option A a <span>gene is inserted to remove mutated DNA.
Reason:
Its option A because something that is not use in genetic engineering is a gene that is inserted to remove a mutated DNA. Its not option B because a gene removed is part of genetic engineering. Its not option C because a gene is that is inserted to make a mutation inactive is part of genetic engineering. Its not option D because genetic engineering can indeed cause or create another gene.
If you need anymore help feel free to ask me!
Hope this helps!
~Nonportrit</span>
In an experiment, these should be only one independent variable. It is the one that doesn't change, whereas you manipulate the dependent variable to test your hypothesis.
Ans: D
Chemical changes:-
occur when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemical decomposition into two or more different substances. These processes are called chemical reactions and, in general, are not reversible except by further chemical reactions.
Hope this can help.
Number of covalent bonds by an atom is equal to number of unpaired electrons.
<h3><u>Explanation:</u></h3>
Valency of an atom is defined as the combining capacity of an atom. Valence electrons are defined as the number of electrons in the outermost shell of an atom.
Now for an atom, when more than one electrons are present, then they often forms a pair. Like for example, if there are 7 valence electrons, 6 get as pairs and only one electron is unpaired. So this is why the halogens like fluorine, chlorine etc has the Valency of 1. For oxygen, 4 valence electrons become paired. And rest 2 electrons form 2 covalent bonds.