a) Which chemical is deposited in collenchyma and sclerenchyma?
b) Which simple tissue is used to make ropes?
c) Why xylem celled dead and phloem calles living tissue..??
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(i). The collenchyma tissue is a simple permanent tissue. The cells of this tissue are living, elongated and thickned at corners due to deposition of cellulose and pectin. It provides mechanical support to plant.The sclerenchyma tissue is other simple permanent tissue that provides support to the plant.The cell walls of this tissue become thickened due to the deposition of hemicellulose and lignin.
(ii) Sclerenchyma tissue is used to make ropes as it consists of dead cells and is strong enough to be made into ropes.
(iii) Xylem is the tissue that helps in the conduction of water in plants. In higher plants it consists of Tracheids and vessels which become dead at maturity due to the deposition of lignin. So the mature xylem is a dead tissue.
In contrast to xylem, the phloem consists of living cells called sieve tube elements. An element has two components a sieve tube cell and a companion cell. It helps in the transport of food.
I hope it will help for u ☺.
(ii) Sclerenchyma tissue is used to make ropes as it consists of dead cells and is strong enough to be made into ropes.
(iii) Xylem is the tissue that helps in the conduction of water in plants. In higher plants it consists of Tracheids and vessels which become dead at maturity due to the deposition of lignin. So the mature xylem is a dead tissue.
In contrast to xylem, the phloem consists of living cells called sieve tube elements. An element has two components a sieve tube cell and a companion cell. It helps in the transport of food.
I hope it will help for u ☺.
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Answer:
Explanation:
The material deposit on cell wall of collenchyma is cellulose and pectin
The material deposit on the cell wall of sclerenchya is lignin
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