define-parenchyma,collenchyma n sclerenchyma.

Asked by vk1994 | 12th Jul, 2008, 01:09: PM

Expert Answer:

Parenchyma is a simple permanent plant tissue composed of thin-walled, unspecialized cells separated by intercellular spaces and which have not lost their power of division.

Collenchyma is a simple permanent plant tissue containing cells characterized by cell walls unevenly thickened with cellulose and hemicellulose and functioning mainly as flexible and supportive tissue.

Sclerenchyma is also a simple permanent plant tissue containing dead cells with heavily lignified cell walls and functioning as a strengthening tissue. 

Answered by  | 12th Jul, 2008, 04:19: PM

Queries asked on Sunday & after 7pm from Monday to Saturday will be answered after 12pm the next working day.