Advertisements
Advertisements
Question
Explain how sieve tubes manage to be living?
Advertisements
Solution
Sieve tube elements of phloem tissue lack nucleus but still they manage to live. This is because they are connected to the companion cells of phloem tissue via numerous plasmodesmata. Both sieve tube elements and companion cells develop from the same meristematic cell and form a functional unit. Companion cells provide proteins, ATP, and other signalling molecules to the sieve tube member as it contains extra number of mitochondria and ribosomes
APPEARS IN
RELATED QUESTIONS
Differentiate between parenchyma, collenchyma and sclerenchyma on the basis of their cell wall.
How does the cork act as a protective tissue?
Explain different types of elements present in phloem.
What are tracheary elements? Describe their functions.
What is simple tissue? Classify and explain its different types with suitable diagram.
Differentiate between cells of Sclerenchyma and Parenchyma
What is a permanent tissue?
Give the structure and function of the following:
Crystal
Name the tissue associated with the following:
Movement of food in the plant body
Choose the correct option.
Collenchyma is a type of ______ tissue.
