Question

In Trapa, some of the roots are
A) Aerial
B) Assimilatory
C) Respiratory
D) Floating

Answer 1

Hint: They have green colored roots that are aerial, which can also perform photosynthesis and can thus prepare their food by themselves and the organisms may also sometimes extract their food from them.

Complete Answer:
Trapa is so-called as Water caltrop, and are floating annual aquatic plants. They have submerged stems that reach a length of 3.7 -4. 6 cm. These plants adhered to the mud through fine assimilatory roots. Sometimes, in a few of the plants having assimilatory roots, the stem and the leaves may be absent.

Additional information:
-The assimilatory roots are found in those plants having diverse habitats, which can be aquatic, terrestrial, and epiphytic.
-These assimilatory roots are green colored, aerial, adventitious roots.
-They prepare the food materials by the process of photosynthesis.
-The assimilatory roots are also known as photosynthetic roots.
-They are also known as reproductive roots as they help in the process of vegetative propagation.
-They synthesize carbon dioxide, water, and carbohydrates in the presence of sunlight.
-These roots have many branches which increase the surface area for the absorption of the maximum amount of sunlight to perform photosynthesis.
-These roots give support to the plants and keep them erect.
-It is commonly found in Tinospora, Traps, and Taeniophyllum.

So, the correct answer is ‘Assimilatory.’

Note: Aerial roots are those roots that are present Above the ground and are adventitious. They grow from plant stem or leaves tissue but not from the roots. Respiratory roots, also called pneumatophores, develop above the ground and have small lenticels for gaseous exchange. The floating roots are the roots that emerge from the nodes of the aquatic plants.