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sir i was attempting an question which stated that rigidity of cell wall is due to lignin and not due to cellulose but what about non lignified plant cells pls clear me i am confused.
Dead cells like sclerenchyma, tracheids and trachea have cell walls made up of lignin. The living plant cells like parenchyma, collenchyma and phloem have non-lignified walls made up of cellulose, hemicellulose, cutin, pectin, and fungal cell walls are with chitin. All cell wall material will provide rigidity to the plant cell.
hello sir. do u have any tests uploaded on TCY I want to attempt them
I just uploaded 20 questions on Cell Biology.
how is this possible tha in schizocarpic fruit, multinucleated seeds (say more than two ) structures breaks up into only two single seeded structures (mericarp or cocci) while it should be many as it is multiseeded ?????????????
In the multiseeded schzocarp, at maturity the fruit breaks into one seeded mericarps. It is advantage for the plant, so that seeds should not fall at a single place and to avoid competition among children. This is a kind of adaptation occured in the course of evolution.
Question is irrevelent. Please be clear in asking question. Is the schizocarp multi-seeded or multinucleated?
help me sir
