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Answer:
C. Dead animals and plants were compressed for many years.
Explanation:
Fossil fuels is the fuel which is formed from dead bodies of plants and animals that are present inside the soil a specific temperature and pressure for millions of years. Oil and natural gas are produced from dead bodies of animals while coal is produced from dead bodies of large number of plants. From these bodies, oil is released and collected inside the soil at a certain depth.
The Calvin Cycle, carbon fixation is the first step also occurs as part of the LIR and takes place in the stroma.
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1. Griffith in his experiment used two related strains of bacteria (Streptococcus pneumonia), known as R and S and mice, trying to develop a vaccine against pneumonia. R strain-formed nonvirulent, rough-edged colonies
S strain- rounded and smooth colonies, with sugar protection coat, virulent
Mice that were injected with S strain developed pneumonia and died.
But, when mice were injected with heat-killed S strain it did not cause disease in mice.
The next part of experiment is the injection of combined harmless R bacteria with harmless heat-killed S bacteria. The result was that the mouse developed pnenumonia and in blood sample from the dead mouse, living S bacteria were found.
2. From his experiment, Griffith concluded that injected together, R strain and S strain bacteria most likely “communicate”. The R-strain bacteria took "transforming principle" (we know today that this is genetic material DNA) from the heat-killed S bacteria which allowed them to "transform" into virulent bacteria.
