The edible part of the sweet potato is a modified

$Rhizophora$ is an example of

Which of the following pairs are correctly matched?
$(1)$ Assimilatory roots — Photosynthesis
$(2)$ Fasciculated roots — Food storage
$(3)$ Stilt root — Mechanical support
$(4)$ Sucking root — Absorption of moisture from the air
Select the correct answer:

Which plant root contains oxidizing agents?

$A$ plant called 'plantless root' is:

Velamen is found in . . . . . . .