Regeneration in planarians depends on the presence of stem cells called neoblasts. These cells are distributed throughout the body and, when part of the worm has been amputated, they are activated to reform the tissues that have been removed.
Stretching out of wavelengths is knows as Redshift
Answer
A) use them to expel excess water from the cell
The correct answer is "R<span>oots to leaves".
Hope this helps!
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the correct answer would be c