The primary source of the greenhouse gases on the Earth is the burning of the fossil fuels. The fossil fuels are used for the generation of electricity in the thermal power plants. The fossil fuels are used to power the engines in the various vehicles like the aircraft, cars, bus, trains and trucks. The fossil fuels are also used for conventional heating of the home during the cold season. When the fossil fuels are burned they release smoke that has carbon dioxide, carbon monoxide, and soot in it. These chemicals trap the heat of the Earth leading to global warming.
<span>Help with chlorophyll formation
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Question:All known organisms use genetic information to produce protein molecules via the same genetic code. This finding strongly supports the hypothesis that __________.
a) the earliest macromolecules probably arose when lightning struck an oxygen-free atmosphere
b) all organisms are descended from one or a few common ancestors
c) the genetic code readily evolves by natural selection
d) there's only one possible way to encode information in a macromolecule
Answer:
b) all organisms are descended from one or a few common ancestors
Explanation:
Protein synthesis occurs when the nucleotide sequence of the mRNA is read in the form of genetic codes. A specific genetic code specifies the same amino acid in all living beings. For example, the code "UUU" codes for phenylalanine in all the living beings irrespective of their species. This suggests that all the life forms have originated from one or few common ancestors and the genetic code has been preserved during the course of evolution of various species.
