1- Periodontal ligament derived from : a. Dental follicle proper b. Perifollicular dental follicle c. Not of all above 2- It is specialized fibrous connective tissue located between alveolar bone proper and cementum is named as : a- Pdl b- Cementum c- Dentin 3- The hour class appearance of pdl is due to : a- The thinnest at apical part b- The thinnest at mid root area c- The thinnest at cervical part 4- The pdl consist of : a- Cell only b- Cell, ground substance and fibrous matrix c- Not of all above

Q: Define centrosome

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A:

Q: following words: diffusion, endocytosis, solute pump, osmosis. The type of active transport in which...

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