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sp2606 [1]
2 years ago
6

Menopause normally occurs between the ages of forty-five to fifty-five, but can be induced prematurely by which procedure?

Biology
1 answer:
Nastasia [14]2 years ago
5 0
A hysterectomy allows one to start menopause early.
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Sexual reproduction would create the most diversity among a population
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Kathy was making liquid growth medium for plants. The pH of the original solution was 8. The optimal pH for plant growth is 6. W
liubo4ka [24]

If referring to the question: Kathy was making liquid growth medium for plants. The pH of the original solution was 8. The optimal pH for plant growth is 6. What was the best compound to add to make it pH=6?

A) KOH

B) HCL

C) Water

D) No answer provided

Then the correct answer would be option B, to add HCL, known as Hydrochloric acid to lower the pH to 6.

In science, pH is a scale used to measure the acidity of a solution or its basicity. The scale ranges from 0 to 14. A pH of 7 would mean that the given solution is neutral, lower than 7 equates to an acidic solution, while anything above 7 becomes increasingly basic.

Option A is to add KOH, or potassium hydroxide to the original solution whose starting pH is 8. KOH is a solution whose pH is above 8,  a strong base, and is often used to increase the pH of a solution. In the question it states what the desired pH is 6, therefore we want to lower, not increase the pH. This makes option A incorrect.

Water is a neutral solution. Even though it is neutral, it is not used to neutralize basic or acidic solutions. Acid or bases may be added to water to create very diluted solutions that are nearly neutral despite containing a strong base or acid, but this is a different process than neutralization and will not give the desired pH. Option C is also wrong.

Option B is correct because HCL, known as hydrochloric acid is a strong acid, commonly used to lower the pH of a solution by increasing the concentration of hydrogen ions. Since we start with a pH of 8 and wish to achieve a pH of 6, HCL is the correct component to add to the solution. Due to option B being correct, option D that states that no answer is provided, is incorrect.

For more on pH visit:

brainly.com/question/491373?referrer=searchResults

8 0
3 years ago
Q40.is a proposed explanation for an observation.
Tcecarenko [31]

Answer:

C. Hypothesis

Explanation:

Hypothesis is a proposed explanation for a certain occurrence and when the explanation is conclusive, then it becomes a theory.

3 0
2 years ago
Shifting plant populations are an example of biological change.A change in temperature is a physical change.Why do biological an
MA_775_DIABLO [31]

Answer:

Organisms depends on physical and biological factors of an ecosystem.

Explanation:

Biological and physical changes cause shift in an ecosystem's populations because the population of organisms depends and greatly affected from the environmental factors such as temperature, moisture etc. These environmental factors causes change in the physical features of an ecosystem so when these changes occur in physical factors, it greatly affected the population of organisms.

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1.Truong made a pitcher of lemonade for a picnic. Which action shows that lemonade is a liquid and not a solid or a gas?A.Thawin
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Answer:

either c or d

Explanation:

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