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kirza4 [7]
3 years ago
5

What is one way that changes can occur in a DNA sequence?

Biology
2 answers:
stealth61 [152]3 years ago
4 0
Mutation. A mistake made while DNA copies which causes changes in DNA
Tom [10]3 years ago
3 0
Through mistakes during DNA copying
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1 )Which of the following is a possible formula unit? PbO Li2B Al2Pb3 ClO
Nataly_w [17]
1. PbO is a possible formula units, since O has charge of 2- and Pb can have a charge of 2+ or 4+, if it uses the 2+ ion, the charges will balance out to form PbO. Li+ and B(3-) would have Li3B, Al(3+) and Pb(2+) are both positive charges and would not balance out, Cl- and O(2-) are both negative charges and would not balance out.

2. Iodine is a halogen, so it has a charge of -1. Calcium is an alkaline earth metal in Group 2, so it has a charge of 2+. Therefore, if they were to form a formula unit, the resultant would be CaI2 (2 iodine atoms of 1- charge are needed to balance out the 2+ charge on the calcium atom).

3. Strontium is an alkaline earth metal with a charge of 2+, while phosphorus has a charge of 3-. Therefore, to balance the charges out, we would need 3 atoms of strontium and 2 atoms of phosphorus. This would give the formula unit of Sr3P2.
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3 years ago
True or false <br> The study of landforms is known as biodiversity.
Sphinxa [80]

Answer:

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landform was not related ti biology it is geography

6 0
3 years ago
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I need an acrostic poem with the word endomembrane.
mr_godi [17]


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Hope thats what you need!
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4 years ago
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marusya05 [52]

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A and B reeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee

8 0
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The MA of a lever is 4. If you have to lift the object up 20 cm,
puteri [66]

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jayfeather friend me

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