Answer:
Coal.
Explanation:
Steam power plant has the lowest efficiency in electricity production which can only be run with the use of fossil fuels such as coal. The efficiency of this power plant is the lowest because large amount of coal is converted into smoke and other gases and very less amount of coal into heat energy. This coal is used to produce heat energy which can be used in the heating of water to produce steam. This steam is used to move turbines which turn mechanical energy into electric energy.
Answer:
The correct answer will be option- B.
Explanation:
The gametophyte is the phase of the life cycle of the plant which produces the gametes of the plants.
The chloroplast is the organelle associated with the production of the food in the form of glucose using sunlight and carbon dioxide. The gametophyte is the reduced phase of the angiosperms and gymnosperms which lacks chloroplasts as the gametophyte of these groups directly depends on the sporophyte of the plants.
Thus, Option-B is the correct answer.
biotechnology is branch of biology wich study about relation ship between living things realated with technology
Answer:
Helium has many unique properties: low boiling point, low density, low solubility, high thermal conductivity and inertness, so it is use for any application which can exploit these properties. Helium was the first gas used for filling balloons and dirigibles.