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Yuliya22 [10]
3 years ago
9

How does an iron nail change after being exposed to the oxygen in the air over a long time? Question 24 options: It burns It dec

ays It molts It rusts
Biology
1 answer:
Anon25 [30]3 years ago
4 0

Answer:

It rusts

Explanation:

Iron is a chemical element that has the ability to RUST when exposed to air and water. Rusting is actually a prolonged chemical process or change that results when iron reactively combines with water and oxygen in the atmosphere to from hydrated (III) oxide in a process called OXIDATION. This compound is behind the color change of the metal.

According to this question, a nail made of iron will change after being exposed to the oxygen in the air over a long time by RUSTING via the oxidative reaction of the iron constituent of that nail with oxygen.

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Conventionally pasteurized milk is sterile.<br> a. True<br> b. False
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Answer: False

Explanation:

Conventionally pasteurized milk is not sterile it gets sterile after it is homogenized. The process of pasteurization involves sudden heating and sudden cowling of milk which does not kills all the microorganism but is intended to kill some of the bacteria and inactivates some enzyme.

Homogenization is a completely separate process  which involve mechanical breakdown of fat molecules in the milk which increases the shelf life of milk by preventing the cream from rising at the top.

Hence, the given statement is False.

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Some organisms undergo asexual reproduction through mitosis, while others reproduce sexually, and their cells undergo meiosis to
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The answer is <span>A. Meiosis: It increases genetic variation, which helps ensure the species will survive.

Meiosis increases genetic variation. This means there is a great variety of genotypes among the population. Hence, there are organisms able to survive in a wider range of temperature. If </span><span>there were drastic changes in temperature in an ecosystem, some of the organisms will survive because their genotype allows them to live in such conditions. If there were no variety thanks to meiosis, all of the organisms would die. And that is not beneficial to a species.
Imagine on the other hand that mitosis occurred. Mitosis does not provide a variety of genotypes and all of the organism will be the same. </span><span>If there were drastic changes in temperature in an ecosystem, all of the organisms would die because all of them could respond to the change in the same way.</span>
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Explanation:

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