Chlorophyll in a plant cell. There is no such organelle exists in animal cells.
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The lettuce is the producer, the lettuce starts the chain and keeps it going for the other ecosystems included in the chain.
A unique feature of the nucleus is that it disassembles and re-forms each time mostcells divide. At the beginning of mitosis, the chromosomes condense, the nucleolus disappears, and the nuclear envelope breaks down, resulting in the release of most of the contents of the nucleus into the cytoplasm.
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