Write the precise function of
(a) sieve tube
(b) interfascicular cambium
(c) collenchyma
(d) aerenchyma.

Explanation

Sieve tube
It is present in the phloem tissue. It's function is the transporation of synthesised food through out the plant

Interfascicular Cambium
In's function is to bring about secondary growth in the dicot stem and root. It is a kind of secondary meristematic tissue present in between two vascular bundles.

Collenchyma
It's function is to provide mechnical support to young growing herbaceous stem. It's cells have angular thickening at corners.
`(#ARH_NCERT_EXE_BIO_XI_C06_S01_042_S03.png" width="80%">
Aerenchyma
It provides buyoncy to the hydrophytic plants. It is a specialised parenchyma having large air spaces.
.