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plastids responsible for pigment synthesis and storage. They mainly contain carotenoids, but can contain any pigment other than chlorophyll.
a tough substance made from a modified polysaccharide that contains nitrogen. It is the main...
deep, narrow holes drilled into the earth to reach the ground water in aquifers.
long threads of genetic material (DNA and histone) found in the nucleus of a non-dividing cell...
a prolonged period of low rainfall which has a negative effect on plant, animal and human life...