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storchak [24]
3 years ago
9

(02.01 HC)

Biology
2 answers:
Elena-2011 [213]3 years ago
7 0

Answer:

The correct answer will be option the nucleic acid is DNA and would be found in the cell's nucleus.

Explanation:

Two types of nucleic acids are found in the organisms - DNA and RNA, which acts as genetic material. Although they both are the nucleic acids they possess certain structural differences in their sugar component and nitrogenous bases.

According to the question, the nucleic acid shows four bases adenine, thymine, cytosine and guanine which are present in the DNA as RNA do not contain thymine but contain uracil instead of that. This DNA is usually present in eukaryotes in packed forms inside a small organelle called Nucleus.

Thus, option the nucleic acid is DNA and would be found in the cell's nucleus is the correct answer.

belka [17]3 years ago
6 0
The nucleic acid is DNA and would be found in the cell’s nucleus.

In short, Your Answer would be Option D

Hope this helps!
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gogolik [260]

Answer:

The correct order is dehydration, embed in wax, cut into sections, staining

Explanation:

There are certain proceedings needed to obtain stained sections of vegetable or animal tissues for their microscope observations.

These steps are:

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  • Fixation: When tissues are extracted from the organism, they suffer autolysis and putrefaction, so they need to be fixated in order to keep their cells in the best state possible. Fixation involves preserving the original morphological and molecular characteristics of the tissue. Fixation avoids autolysis, putrefaction, distortion, and retraction of cells and the tissue that could affect its volume or morphology.  
  • Dehydration. Once fixated, the fixator must be eliminated and the tissue is dehydrated by using a gradual series of solutions with alcohol in ascendant concentrations. Dehydration must be gradual to avoid tissue deformation.
  • Inclusion. To obtain thin cuts that can be observed under the optic microscope, the tissues must be included in a consistent, firm substance, that might be either hydrophilic or hydrophobic. A hydrophobic medium is paraffin wax, that provides hardness and plasticity.  
  • Cut. The tissue included in wax must be cut in slides or sections thin enough to allow the diffusion and penetration of light. A microtome is used to perform these cuts. When using paraffine for tissue inclusion, the cuts are about  5 to 20 micrometers of thickness.
  • Stain. Once the cuts are performed, paraffin wax must be eliminated. This can be done by using an organic solvent. Then the tissue must be stained. Hematoxylin and Eosin are the most common dyes. Animal tissues in general do not have any natural color, so they need to be stained to be observed.  
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Lithosphere is the correct answer
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QUESTION 1:
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