Water, Carbon, Nitrogen, Phosphorus and Sulfur cycles
Explanation:
The movement and transformation of certain materials through parts of the earth's system known as the biogeochemical cycle involves the following compounds and elements: Water, carbon, nitrogen, phosphorus and sulfur.
- The cycle illustrates that the earth is indeed a closed system based on the circulation of these matter.
- It involves the movement of compounds from living and non-living component of earth.
- All of the components of the cycles are important to life and helps to sustain living.
Learn more:
Biogeochemical cycle brainly.com/question/3509510
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molten material
magnetic stripes
Explanation:
The evidence that supports the proposition that sea floor spreading occurs from the options are the magnetic stripes and molten materials.
Harry Hess proposed the concept of sea floor spreading which further led to the development of the theory of plate tectonics.
Some of the evidences used are :
- Magnetic stripes in the rocks of the oceanic crust around spreading centers.
- They were discovered using magnetic survey of the ocean floor.
- Bands of magnetic minerals were seen to be oriented in particular direction and forms different patterns in the rock.
- Also, along spreading centers, molten materials rich in basalt abounds.
- This is because when sea floor begins to move apart, magma upwells from deep within the asthenosphere to replace them.
learn more:
Sea floor spreading brainly.com/question/9912731
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Answer:
When an impulse reaches the muscle fibres of a motor unit, it stimulates a reaction in each sarcomere between the actin and myosin filaments. This reaction results in the start of a contraction and the sliding filament theory.
Hope this helps! :)
