Answer:
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Explanation:
Water is called the "universal solvent" because it is capable of dissolving more substances than any other liquid. ... Water molecules have a polar arrangement of oxygen and hydrogen atoms—one side (hydrogen) has a positive electrical charge and the other side (oxygen) had a negative charge.
Cooking an egg is a set of chemical changes because chemical bonds are broken and new ones are made, resulting in the formation of new substances. In this case many of the bonds broken are those which cause the egg's proteins to be folded into a globular shape. The protein chains unfold and become entangled causing the setting effect. This is often called denaturing. Whether or not a change can be reversed has no bearing on whether it is chemical or physical. This particular change is almost impossible to reverse because of entropy effects but that simply isn't true of all chemical reactions, and there are many physical changes which are hard to reverse.
31 pairs
Spinal nerve, in vertebrates, any one of many paired peripheral nerves that arise from the spinal cord. In humans there are 31 pairs: 8 cervical, 12 thoracic, 5 lumbar, 5 sacral, and 1 coccygeal. Each pair connects the spinal cord with a specific region of the body.
Answer:
Ethylene gas
Explanation:
The gas is produced in trace amount by plants (virtually every part of the plant is capable of producing ethylene because it is a gas and it diffuses) and has an effect on plants. Ethylene gas is responsible for ripening of fruits, opening up of flowers and senescence and abscission of leaves. Also, when one puts a ripening fruit among unripe fruits, the unripe ones will ripen in a matter of days – because the ripe one produces ethylene gas which has en effect on the others. Commercially, farmers harvest fully developed bu unripe fruits and then expose them to ethylene gas to ripen when they reach the market. This alleviates food spoilage in transit.