Please Explain this paragraph
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YES.
Explanation:
It says that two scientists ( F.Skoog and his co-worker) examined a tobbaco stem(plant). Callus is a name given to different cells in the stem, in order for their growth, for an increase in callus cells, not only auxins(a cell that promotes growth) are required, but also we will need a nutrient medium (of certain things mentioned there), it will help the stem cells i.e. callus to grow.
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