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Amount of wear, and how long they are may contribute with age and maybe even coloration and pigment.
Replication it shows the production of identical copies of DNA and Transcription transfer the coded message for protein synthesis from DNA onto mRNA
Answer:
Following are the salient adaptations of villi that make them good absorbers:
Villi are single cell thick. ...
Villi have rich network of blood capillaries . ...
Most important is: Apical membranes of Villi further form many finger-like projections called microvilli or brush borders. ...
Villi have permeable membranes .