Answer:
well obviously the answer is B climate change beacuase when there in an increase in technological revolution the industry will grow bigger to and so the emmsion of green house gas and other toxic that might harm the climate
The plastic wrap that could have caused the browning effect is the ; Plastic wrap made of polyethylene
Ethylene is a multifunctional phytohormone that regulates growth and senescence ( softening and ripening of fruits ) in plants. Ethylene is a gaseous substance produced by fruits after they are harvested, which accelerates the softening and ripening of the fruits.
The browning of the banana will mostly likely be caused by the presence of the ethylene in the polyethylene plastic wrap.
Hence the plastic wrap that could have caused the browning effect on the banana is the polyethylene plastic wrap.
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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:
- Obtention of the material: The tissue is cut to an adequate size.
- 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.
Primary producers use an energy source (usually sunlight) to build organic molecules.
