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Allisa [31]
2 years ago
13

Help please i will mark brainlist!

Biology
2 answers:
suter [353]2 years ago
5 0

Answer:

dear student answer us C

barxatty [35]2 years ago
5 0
The answer is C
Hope it helps
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Iron reacts with atmospheric oxygen to form iron oxide or ferric oxide. Look at the chemical equation for this reaction:
kondaur [170]

Answer:

4 Fe + 3 O₂ → 2 Fe₂O₃

Explanation:

Let's start with the oxygen.

Reactants - 2

Products - 3

What number do 2 and 3 have in common? 6.

Put a 3 in the reactants and a 2 in the products to balance the oxygen.

Fe + 3 O₂ → 2 Fe₂O₃

Now let's look at the iron.

Reactants - 1

Products - 4

Put a 4 in the reactants to balance the iron.

4 Fe + 3 O₂ → 2 Fe₂O₃

The equation is balanced. Hope that helps.

8 0
3 years ago
Which one of the following discoveries involving DNA happened first
Ostrovityanka [42]
Oswald Avery in 1944 discoveries DNA was responsible for storing and passing information throughout generations
3 0
3 years ago
Genetically identical armadillos were kept in the same controlled environment from birth and provided the same diet. Even though
Vlada [557]

Phenotypic variations in genetically identical organisms that grow in the same controlled environment may be due to mutation.

<h3>Mutation</h3>

This refers to a sudden change to the DNA sequence of living organisms.

When the DNA base sequence of organisms changes, the effect is shown in the morphology of organisms.

For organisms that are genetically identical but grow in different environments, phenotypic variations might exist as a result of environmentally acquired traits during the struggle to adapt to their environments.

In the same environment, however, genetically identical organisms are not expected to be phenotypically different, unless a mutation to the DNA of one has occurred.

More on mutation can be found here: brainly.com/question/17106056

7 0
2 years ago
Any change in allele frequencies in a gene pool is
Goryan [66]
Any change in allele frequencies in a gene pool is a mutation 
8 0
3 years ago
4) Biotechnology has helped produce crops that are resistant to certain pests, crops that produce high yields, and more nitrogen
Kryger [21]

Answer: Option a

Explanation:

Biotechnology is the branch which deals with the most advanced techniques which is required to make the life easy.

One of the most important application is Genetically modified crops. Genetically modified crops are pest resistant and have many advantages.

There are few disadvantages one of them is beneficial insects are also adversely affected. There are many useful insects that helps in pollination and    they are also killed because of pest resistant plant.

hence the correct answer is option A

7 0
3 years ago
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