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Musya8 [376]
3 years ago
12

What is an ecological system consisting of all of its biotic and abiotic factors?

Biology
1 answer:
Wewaii [24]3 years ago
6 0
The correct answer is b. ecosystem. An ecosystem refers to the living and non-living factors in a particular area. The living organisms like bacteria, animals and plants are the biotic factors and the non living components like soil and water are the abiotic factors.
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Which is most likely to result after a farmer sprays his crops with pesticides
WITCHER [35]

Answer:

The bugs in the soil or on the plants will die

Explanation:

The bugs and some of the plant will be infected some will die some will stay alive it all depends on how strong the pesticide is and consummation of the crop will sometimes result in a dangerous turn of event to your stomach if not washed properly.  

5 0
3 years ago
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Proteins are important food nutrients. A technician working at a food company is interested in the nutritional content of seeds/
Vladimir79 [104]

Answer: Sample 1 then, has more variety of proteins but less quantity of each one, while sample 2 has less variety but more quantity of the two proteins present.

Explanation:

Proteins are molecules found in the cells of all living organisms. A protein is composed of monomers called amino acids linked together by peptide bonds. To analyze proteins, a technique called SDS-PAGE (sodium dodecyl sulfate polyacrylamide gel electrophoresis) is used. <u>This technique is used to separate proteins according to their electrophoretic mobility, depending on polypeptide chain length, molecular mass, post-translational modifications and other factors</u>. SDS (sodium dodecylsulfate) is an anionic surfactant compound that breaks non-covalent bonds in proteins, denatures them causing these protein molecules to lose their native conformation and provides the polypeptide with a negative charge that is proportional to the chain length (the number of amino acids) and, therefore, to the molecular mass of the protein. The electrostatic repulsion created by the binding of SDS to the protein is one of the causes of the protein losing its native conformation, thus eliminating the differences in conformation of the different proteins to be separated in the gel.

An electric current is applied to the gel where the proteins are seeded, causing the negatively charged proteins to migrate through the gel in the direction of the anode (positively charged region). Short proteins will move more easily and faster through the pores of the gel, while larger proteins will find it more difficult to do so. After a certain time, the proteins will have migrated according to their size (measured in kDa or kiloDaltons). After electrophoresis, the gel should be stained with Coomassie blue or silver stain, allowing visualization of the separated proteins. After staining, the different proteins will appear as distinct bands on the gel. In addition, the higher the amount of a protein, the more intense the color of its band will be.

Extract No. 1 shows three bands: 25, 30 and 35 kDa. <u>This means that it has three different proteins</u>, each with a different molecular weight. Extract number 2 shows two bands: 25 and 35 kDa. <u>It means that this sample has only 2 proteins. And being bands of higher intensity, we can say that there is more of each protein.</u>

Sample 1 then, has more variety of proteins but less quantity of each one, while sample 2 has less variety but more quantity of the two proteins present.

8 0
2 years ago
Burrowing animals like this one dig holes in the ground, breaking up soils. What kind of weathering is this?
Maslowich

Answer:

Weathering describes the breaking down or dissolving of rocks and minerals on the surface of the Earth. Water, ice, acids, salts, plants, animals, and changes in temperature are all agents of weathering.

6 0
2 years ago
Molecules may be assembled into a microscopic structure called a(n) blank which carries out specific functions within a cell.
Semmy [17]
Cells are combined in a structure called tissue wich have the same properties like the cells wich are formed by.
8 0
3 years ago
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Why do some leaves turn from green to red, orange, or yellow in the fall?
11111nata11111 [884]

Answer:

Chlorophyll Breaks Down

Explanation:

because of changes in the length of daylight and changes in temperature, the leaves stop their food-making process. The chlorophyll breaks down, the green color disappears, and the yellow to orange colors become visible

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7 0
2 years ago
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