Answer:
En gel de agarosa es un polisacárido que forma una matriz similar a la gelatina. El gel proporciona un sustrato sobre el que se puede producir la separación del ADN. Los fragmentos de ADN más grandes toman más tiempo para migrar a través de la malla de la matriz. Este fenómeno facilita la separación de las moléculas por tamaño
Explanation:
D) Fossils could not be found in that layer of rock.
Answer:
Using the real system might mess up and using a computer model is clearer and gives a more advanced view
A. Earth's magnetic field reverses over time; the changes show that seafloor spreading has taken place over time.
Explanation:
The pattern of the magnetic minerals in seafloor ridges are aligned in a repeating pattern because the earth's magnetic field reverses overtime.
This provides evidence because the changes shows that the sea floor spreading has taken place over time.
- The concept of sea floor spreading was first suggested by Harry Hess in the early 1960's.
- Using sophisticated tools, he was able to discover stripe patterns of magnetic minerals in rocks.
- The earth can be likened to a giant bar magnet
- The geomagnetic field originates from the core where the movement of molten metals induces magnetism.
- In a fresh cooling magma, the metallic minerals are able to align their domains with the prevailing magnetic field.
- At some point the magnetic field is normal with a very strong intensity. At other times the intensity is low and it reverses.
- The minerals keeps track of the changes.
- This leads to striped pattern that has been used to suggest sea floor spreading.
learn more:
Sea floor spreading brainly.com/question/9912731
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