Advertisements
Advertisements
Question
Explain how sieve tubes manage to be living?
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
Give two functions of collenchyma.
What is simple tissue? Classify and explain its different types with suitable diagram.
Identify the odd word and explain why it is odd.
Differentiate between cells of Parenchyma and Collenchyma.
Write 'True or False' for the following statement:
Sclerenchyma cells have intercellular spaces.
Write 'True or False' for the following statement:
A vascular bundle conducts prepared food only.
The question has four answers. Choose the correct answer:
Hard lignified thick walled, long and pointed cells in a plant are
The question has four answers. Choose the correct answer:
A component of xylem is
Choose the correct option.
Collenchyma is a type of ______ tissue.
Differentiate between Xylem and Phloem functioning
