Answer:
A. Fuel.
Explanation:
Coal is extensively used as a fuel in many countries for the production of electricity. When coal is heated, the heat energy is used to convert the liquid water into steam which is used to move turbines in the electric power plant. When these turbines moves, the electricity is produced. This fossil fuel is also used for warming of rooms and cooking delicious foods.
Answer:
Open-mindedness. Capable of accepting new and different ideas.
Skepticism. Having an attitude of doubt.
Honesty. Scientists report results truthfully.
curiosity. leads to new scientific knowledge.
creativity. involves coming up with new sources and ways to solve problems or produce things.
Mechanical digestion is the breaking down of food into smaller pieces physically. Mechanical digestion begins in the mouth as the food is chewed.
but in the case of chemical digestion, it breaks the food into simpler nutrients that can be used by the cells. Chemical digestion begins in the mouth when food mixes with saliva.
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and ur welcm
The factors are: The size of the sample, the extraction method, the method of purification and preservation of the DNA.
The quantity and quality of DNA can be greatly improved by performing PCR.
* Purification of nucleic acids is a key step for functional studies in biology. Because of the great diversity of living organisms in nature, purification becomes a real challenge for researchers, especially cell lysis.
The evolution of lysis methods has made it possible to improve efficiency, speed and simplicity. But, this lysis step remains a crucial step for the efficiency and the quality of the purification.
The warm ocean water is usually found near the top surface of the ocean. The sun makes the surface of the ocean warm and thus heat up its water. This heat is later mixed by the winds and sea waves from top to beneath the ocean surface. The temperature of the surface is usually warmer than the water at depths as it does not receive sun light. The average ocean temperature at the surface is 17 degree Celsius while at greater depth the temperature falls down to 0 to (-3) degree Celsius
