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"changed" (and any subsequent words) was ignored because we limit queries to 32 words.
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Internal and external regulators are two types of proteins that regulate the cell cycle. Internal regulators allow the cell cycle to proceed only after certain events occur. External regulators speed up or slow down the cell cycle.
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I hope this helps :)
If a pair of Organisms are capable of producing fertile offspring in nature they must belong to the same species
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can you expand on that it not clear what you want
You can do golden rice. It was genetically modified to produce beta carotene, which rice does not usually have. When metabolized by the body beta carotene is turned to vitamin A which is essential to human vision, immune systems, and healthier skin
