The same is true for sea squirts. Yes, in fish the pharyngeal pouches go on to push through to the outside of the body, and the tissues between the 'slits' develop into the gill bars of bone or cartilage that support the delicate filaments of the gils themselves.
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Plastics made up only 1% of MSW in 1960. This has increased to 12% (30 million tons) in 2008. 43% of this is containers and packaging, 22% is nondurable goods, and 35% is from durable goods. This means that 11.3 million tons of just containers and packaging end up in landfills each year. Most people agree that recycling is a preferred method of dealing with plastics. However, only 24% of municipal waste is recycled and 9% is composted, for a total of only 33% of waste that is recovered.