Varies
Explanation:
From the differences in the width of the alternating stripes, we can conclude that the lengths of time represented by this evidence varies.
Normal and reversed polarity do not have equal length of time when they occur.
- The paleomagnetic field just like the earths geomagnetic field we have today varies from time to time.
- During period of normal polarity, the north pole of the geomagnetic field is close to that of the earth.
- At reversed polarity, the north of the magnet changes position.
- Their is no regular interval to this
- Magma that are getting magnetized during this period will have different variations in the width of the magnetic fields.
- The width of the stripe shows the duration of the anomaly.
- Since the geomagnetic field takes their root from the core, the intensity varies and it affects the extent of magnetization of magnetic minerals in rocks.
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That is the cell membrane. Think of it as a gate around a city, that is how I remember it. The city is the cell, and the cell membrane is the gate that "protects" the city, and controls what can enter and exit.
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Receiving voices process I think this will help you :)
<span>Wetlands help reduce erosion through B. sediment trapping.
Soil and rocks are trapped and then there is no erosion or crumbing of the ground and rocks.
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