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anyanavicka [17]
3 years ago
13

What is a substance?

Biology
2 answers:
Dafna11 [192]3 years ago
7 0
A substance is usually a form of matter having constant chemical composition and characteristic properties.
fomenos3 years ago
6 0

Answer:

the real physical matter of which a person or thing consists and which has a tangible, solid presence.

Explanation:

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3 years ago
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What would happen if plants could not produce glucose.
Serggg [28]

A plant that is unable to produce glucose will likely die.

<h3>WHAT IS PHOTOSYNTHESIS?</h3>

Photosynthesis is the process whereby green plants obtain their food using energy from sunlight.

The food molecules are in the form of an organic compound called glucose. The glucose is the source of energy for living cells.

This means that if a plant cell is unable to produce glucose, the plant will likely die because there is no source of energy for metabolic activities.

Learn more about photosynthesis at: brainly.com/question/1388366

7 0
3 years ago
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Which of the following is an example of an exothermic process?
erastovalidia [21]

The answer to the question above is letter a. melting.

>Exothermic is the giving off heat energy the  transfer of energy to the surroundings.

>In exothermic reaction, the energy is usually transferred as heat energy

<span>> Other example of exothermic is combustion</span>

7 0
3 years ago
which of the following balances performs in a closed compartment with no air currents to disturb measurement
Andrei [34K]

A balance that performs in an enclosed compartment  with no air currents to disturb is called an analytical balance.

Analytical balances are instruments used for precise and determination of mass of matter. They are accurate and very precise instruments. They require a draft-free location on a solid bench that is free of vibrations.

Analytical balances of today are digital and have built in calibration weights to maintain accuracy. Older versions usually require to be manually calibrated using specific  standard weights.


7 0
3 years ago
Overall, how has science impacted human health?
mixas84 [53]

Answer:

The correct answer is: <em>C. Increased average lifespan to 78 in the US.</em>

Explanation:

Science has impacted human health by increasing the average lifespan to 78 in the US. Over the last couple of decades, the life expectancy of Americans has increased significantly than what it was 200 years ago. This can be attributed to:

1. Vaccinations- Since the invention of vaccinations, diseases such as tuberculosis, cholera and polio which were major causes of death 200 years ago have virtually been eradicated in the US.

2. Abundant and safer foods available- Commercial and large scale farming has made a wide variety of nutritious foods easier to obtain.

3. Improved sanitation- Safer drinking water, sewage treatment and stricter food inspection has significantly reduced the rate of illnesses due to poor hygiene and sanitation.  

In these ways, science has impacted human health by increasing the average lifespan to 78 in the US.

8 0
3 years ago
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