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madreJ [45]
2 years ago
12

Is the phenol red indicator used to detect the amount of carbon dioxide or oxygen? Explain.​

Biology
1 answer:
Stells [14]2 years ago
8 0

Answer:

<em><u>As the instructor, you supply the carbon source by blowing bubbles in phenol red. The carbon dioxide in your breath will dissolve in water to form carbonic acid, which lowers the pH of the solution. Phenol red turns yellow in a pH lower than 7, revealing in this case the presence of a carbon source.</u></em>

Explanation:

mark me as a brainlist plz.

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Technological advancement of the society causes energy crisis in different parts of the world. one group of scientists has devel
Leviafan [203]

Limited installation sites best describes a drawback in the scientists' plan because tidal energy is not present everywhere.

<h3>Describes a drawback in the scientists' plan?</h3>

The big disadvantage of tidal power is that there are limited installation sites for it. It is expensive as well as the turbines can adversely impact the surrounding ecosystem.

So we can conclude that limited installation sites best describes a drawback in the scientists' plan because tidal energy is not present everywhere.

Learn more about energy here: brainly.com/question/13881533

#SPJ1

5 0
2 years ago
You are taking notes in a lecture, writing as fast as you can, when suddenly your hand become so stiff that you can't write any
Georgia [21]
Hello


Your hand went into a shock because of overuse it is a common thing

Hope this helps
Plz mark me as brainist
6 0
2 years ago
Which of the following best explains why what we know about cells is called a theory and not a law?
postnew [5]

Answer:

I would say We don't have enough evidence or Cell theory is still changing.

Explanation:

There are so many cells in everything so it's almost impossible to know exactly what is going on. Theories about cells have been going on for over 500 years, and we still don't know exactly what is what.

3 0
2 years ago
What is the source of energy that powers a hydroelectric power plant?
Verdich [7]

Answer:  Given your four choices, the best/most correct one would be (c) the sunlight that evaporated water that eventually falls as rain and fills the reservoir. It is the potential energy stored in the reservoir water which is "released" as it is converted to kinetic energy (the movement of water which spins the hydroelectric generator turbine, etc.), but the absolute source of that original potential energy comes from the Sun's action to evaporate lake or ocean water which is returned to Earth as rain ... and it is this rainwater which ultimately fills the reservoir behind the hydroelectric power plant.

Explanation:

4 0
2 years ago
Which crops provide more than half of the calories consumed by humans?
raketka [301]
Wheat, corn and rice more than half of the calories consumed by humans. It provides nearly 60% of total plant calories consume by humans. These three crops are grown worldwide. Although there are specific crops for specific region. One of the old cultivated crops is wheat. While corn is another version of wild cereal grass. Rice is the primary source of food.
7 0
3 years ago
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