The gel should be placed in the correct direction so that the DNA bands can move.
- DNA is negatively charged due to the presence of phosphate groups, so it can only move towards the positively charged anode, otherwise, it will not move.
- So, when gel electrophoresis is done the side of the gel where the wells have been created and DNA samples have been loaded is placed at the side of the cathode, whereas the other side is connected to the anode.
- When the current flows, the DNA fragments also move from negatively charged cathode to positively charged anode as per their mass and size.
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<span>All natural disasters affect the ecosystem. They affect lands, forests, and coasts and cause death to people, plants and animal species, the spread of invasive species, and loss of habitat. In the short term, they cause climate change but over time, there are some types of natural disasters that increase biodiversity in the long run. Examples of these are earthquakes, landslides, volcanic eruptions, and wildfires. They play an important role in rejuvenating the ecosystem that they once destroyed.</span>
In this question, let us cite one specific example:
<span>1. </span><span>Volcanic eruption. The eruption has an immediate negative effect on surrounding, but through primary succession, the forest begins re-colonization almost immediately. Many plants, insects, and animal species arrive from adjacent places to take up residence. These life forms are adapted to survive in the severe conditions following volcanic eruption causing a new and more diverse forest ecosystem that will last a 150 year period.</span>
The
Thymocyte progenitors enter the subcapsular region of the thymus as
double-negative cd3- t cells where the double negative refers to lack of
cluster determinants CD4 and CD8. Double-negative cd3- t cells exist as small population
that is 1%-5% of lymphocytes in the lymphoid organs and peripheral blood of
humans and normal rodents.
Answer:
d is the correct answer
Explanation:
an ionic bond forms when positively charged metal ion attract to negatively charged ones
hope this helps !
"With its systematic approach, the scientific method has proven useful in shaping sociological studies. The scientific method provides a systematic, organized series of steps<span> that help ensure objectivity and consistency in exploring a social problem. They provide the means for accuracy, reliability, and validity."
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https://courses.lumenlearning.com/alamo-sociology/chapter/the-scientific-method/
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