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Ierofanga [76]
2 years ago
6

WILL MARK BRAINLIEST!

Biology
1 answer:
natka813 [3]2 years ago
5 0

Answer:

D. Tap water is one of the three test conditions of the independent variable, the type of water.

Explanation:

An independent variable is the part of a science experiment that is changed. Since you are changing the type of water, the independent variable would be the water. There are 3 types of water in this experiment, meaning the tap water is one of the 3 test conditions of the independent variable.

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Identify the purpose of each of the following steps in the photosynthesis experiment.
Orlov [11]

Answer:

A. Hole-punching the leaves- The purpose of hole punching the leaves is to make discs out of the leaves which are able to fit in into the syringe used in the experiment and which are also able to float

B. Adding bicarbonate buffer- Bicarbonate buffer is added as a source of carbon to leaves undergoing photosynthesis.

C. Exposing the disc to vacuum in the syringe - the leaves are exposed to vacuum in the syringe in order to remove or displace trapped air in the leaves so that the bicarbonate buffer can enter the interior of the leaves and the disc will then sink to the bottom of the syringe.

D. Adding a plain buffer- the plain buffer serves as the control experiment as it does not provide a carbon source for the discs in the experiment.

Explanation:

The floating disc experiment is used to demonstrate the process of photosynthesis in leaves. In the experment, the following procedures are followed:

A. Hole-punching the leaves- The purpose of hole punching the leaves is to make discs out of the leaves which are able to fit in into the syringe used in the experiment and which are also able to float

B. Adding bicarbonate buffer- Bicarbonate buffer is added as a source of carbon to leaves undergoing photosynthesis.

C. Exposing the disc to vacuum in the syringe - the leaves are exposed to vacuum in the syringe in order to remove or displace trapped air in the leaves so that the bicarbonate buffer can enter the interior of the leaves and the disc will then sink to the bottom of the syringe.

D. Adding a plain buffer- the plain buffer serves as the control experiment as it does not provide a carbon source for the discs in the experiment.

In the results of the experiment, the discs in the bicarbonate buffer will float as oxygen is produced during photosynthesis. However, the discs in the control remain at the bottom of the syringe as photosynthesis do not occur in the absence of a carbon source.

3 0
3 years ago
Identify the following as biotic or abiotic.
yanalaym [24]

Answer:

sunlight and heat: Abiotic

insects: Biotic

rotting log: Biotic

bacteria: Biotic

water: Abiotic

rocks: Abiotic

Explanation:

5 0
3 years ago
Match the scientist with the research studies
harina [27]

Answer:

Astronomy: Planetary motion galaxies.

Chemistry: Composition of matter.

Geology: Physical structure of the Earth.

Physics: Natural laws of the universe.

Explanation:

I hope it helps!

6 0
3 years ago
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