Since the 1970s, many changes in waste disposal have taken place. Recycling has become a regular part of garbage pick-up. In some places it is mandatory. Compost pick-up, clean incineration, and proper disposal in high-tech, environmentally-friendly industrial centers is common practice for industrialized nations. This is not true in other parts of the world where poor waste management practices are still in use.

photosynthesis makes the glucose that is used in cellular respiration to make atp. the glucose is then turned back into carbon dioxide, which is used in photosynthesis. while water is broken down to form oxygen during photosynthesis, in cellular respiration oxygen is combined with hydrogen to form water.

igneous rocks are formed by solidification of cooled magma (molten rock), with or without crystallization, either below the surface as intrusive (plutonic) rocks or on the surface as extrusive (volcanic) rocks.  

the composition depends on the source magma. there are almost a thousand types of composition found till now.  

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you know they are heterozygous for a trait because they have it as jj or jj.