Read: https://kids. britannica. com/kids/article/DNA/390730 (Links to an external site.) Answer the following questions:

1. What sort of things does DNA determine for a creature? (Think physical traits)

2. Sometimes there are mistakes in DNA, what are these mistakes called? what sort of things can these mistakes cause?

3. What makes up the sides of the DNA structure?

4. There are four different bases in DNA: adenine, thymine, guanine, and cytosine. About how many total pairs do humans have in their DNA?

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Explanation:

2fe + 3h2so4 -> fe2(so4)3 + 3h2

it is necessary to balance equations in order to get the proper amount of reactants as well as products in order not to make a miscalculation.

you cannot change the subscripts as that would change the substance itself. for instance, diatomic elements such as h2 only have the subscript two when a gas. another example would be so4, if you were to change the subscript, the element would no longer be sulfate.

we change the coefficients instead as that only changes the number of molecules rather than the substance itself.

hope this !