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strojnjashka [21]
3 years ago
15

What two structures are involed in energy production on the cellular level

Biology
2 answers:
Luden [163]3 years ago
8 0
It's <span> chloroplasts and mitochondria </span>
SCORPION-xisa [38]3 years ago
7 0
<span>Mitochondria and Chloroplast</span>
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Which structure is responsible for the absorption of nutrients from food?
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The small intestine. :)

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certain substances are placed in the beaker in given picture if the following items are placed in a water filled beaker then sta
Yuliya22 [10]

Answer:

1. gravel of the sand: a part is dissolved and the remainder is grouped at the bottom of the beaker.

2. drop of sunflower oil: It is not absorbed and heaps on the surface of the water contained in the beaker.

Explanation:

Gravel of the sand is a polar substance. This means that this substance has the ability to dissolve and mix with water in a system in which both were placed together, such as a beaker, for example. However, the beaker limits the amount of water, which limits its ability to dissolve polar substances. Therefore, depending on the quantity, the gravel of the sand, when placed in a beaker with water, will dissolve, in parts, what is not dissolved will accumulate in the bottom of the beacker, because the gravel of the sand is denser than the water.

With the drop of sunflower oil the exact opposite happens. This is because drops of oil are nonpolar substances, which means that they do not have the ability to be dissolved in water. This means that when dropped into the beaker with water, the drop of sunflower oil will not dissolve, but will pile up on the water surface, because it is less dense than water.

6 0
3 years ago
In the experiment described in the scenario, which group represents the control group?
kow [346]

Answer: D.) Plant D

Explanation: A control group is composed of the test subject(s) that do not receive any experimental treatment. In this case, Plant D is the control group because it does not listen to any music unlike the rest of the plants.

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3 years ago
A DNA molecule produced by combining DNA from different sources is known as
Digiron [165]

Answer:

A DNA molecule produced by combining DNA from different sources is known as recombinant DNA.​

Explanation:

Recombinant DNA (rDNA) can be obtained by coupling DNA fragments from different sources, a process that is performed at the restriction site level and uses enzymes.  

Once rDNA has been designed —cutting out fragments of DNA that are then reassembled— it must be brought to a specific location in the cells, to be copied and expressed, using means of transport called vectors.

<u>DNA recombination</u> is performed in biotechnology laboratories specialized in the manipulation of genetic material.

The other options are not correct because:

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  • <u><em>Hybrid DNA</em></u><em> is a variant of recombiant DNA, in which only two DNA molecules from different sources are used. </em>
  • <u><em>Polyploid</em></u><em> refers to cells containing the genome of different species.</em>
8 0
2 years ago
Nucleic acids and carbohydrates are both types of what?
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The answer is A. macromolecules

There are 4 types of macromolecules; lipids, proteins, carbs and nucleic acids
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