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Marrrta [24]
3 years ago
5

why did the researchers add filtrate which macerated moss had been removed to control microcosms?(worth 5marks)​

Biology
1 answer:
Mice21 [21]3 years ago
5 0

The researchers in question opted to remove the macerated moss from the control group in order to <u>guarantee that the </u><u>results </u><u>were accurate. </u>

The experiment in question consists of:

  1. Placing volcanic rock samples into two glass containers
  2. Adding to one container the mixture of macerated moss and water
  3. The other container is the control, it receives only water
  4. The goal is to measure the release of minerals from the rocks.

When performing an experiment, the control group is of vital importance. The presence of a control group ensures the <em>accuracy</em> of an experiment.

Given that moss is grown on rocks and will erode the rock over time, the researchers opted to remove it from the control sample. <u>Minerals present in the rock might mistakenly be measured as </u><u>minerals </u><u>released from the volcanic </u><u>sample</u>, thus making the results of the experiment inaccurate.

To learn more visit:

brainly.com/question/1073731?referrer=searchResults

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What are short-lived climate pollutants?
professor190 [17]

Answer:

Black carbon, tropospheric ozone, methane, and hydrofluorocarbons (HFCs) are all considered short-lived climate pollutants (SLCPs). Because these pollutants have atmospheric lifetimes of only days to a decade and a half (compared to CO2 which can persist in the atmosphere for millennia) they are referred to as short-lived climate pollutants.

Explanation:

3 0
2 years ago
In humans there is approximately 30% adenine (A). What is the percentage of each of the other 3 DNA bases?
kvv77 [185]

In Double Stranded DNA , Adenine pairs with Thymine as we know, it means amount of A = Amount of T. Here A=30% so T=30%

Total will be 100% (for all 4 bases) , left out is 30 % which will be equally divided by Guanine and Cytocine , hence G=20% and C=20%.

A=30% T=30% G=20% C=20%

7 0
2 years ago
Why does the oxidation of organic compounds by molecular oxygen to produce CO₂ and water release free energy?
Scorpion4ik [409]
The oxidation of organic compounds by molecular oxygen to produce CO2 and water releases free energy because electrons are being moved from atoms that have a lower affinity for electrons.
6 0
3 years ago
Emily has been asked to find out how
Juliette [100K]

She should investigate how temperature affects the rate of oxygen production.

<h3>Photosynthesis</h3>

During photosynthesis, green plants make use of inorganic products in the form of water and carbon dioxide to synthesize carbohydrates. The reaction only happens in the presence of solar radiation and oxygen is evolved as a by-product.

The process involves a series of chemical reactions. However, the summary of the whole reactions is represented by the following equation:

carbon dioxide + water ----> glucose + oxygen

Thus, if Emily is to find out how temperature affects photosynthesis. She will need to use a plant as a case study. One factor that can easily be used to measure the rate of photosynthesis is oxygen production by plants.

In other words, Emily will have to set up an experiment where a plant species will be subjected to the same environmental conditions, except temperature. Then, a suitable method will be used to measure the amount of oxygen produced. Any difference in the volume of oxygen produced can then be attributed to the effects of temperature.

More on photosynthesis can be found here: brainly.com/question/1388366

#SPJ1

3 0
2 years ago
The manipulation of genes for practical purposes, such as medicine, agriculture, or criminal justice, is called
Deffense [45]

The manipulation of genes for practical purposes, such as medicine, agriculture, or criminal justice, is called GENETIC ENGINEERING. These technologies involve the manipulation of the DNA molecule.

Deoxyribonucleic acid (DNA) is the molecule that carries the instructions (i.e., genes) for all organisms to develop, survive, grow and reproduce.

Genetic engineering techniques consist of the manipulation of the DNA molecule in order to produce desirable phenotypic features in the offspring of an organism.

Genetic engineering techniques use recombinant DNA strategies to modify the genetic makeup (DNA) of the target organism.

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