Question

The roots of the aquatic plant hydrilla are poorly developed and lack xylem tissue. Which is an appropriate justification for this?

Answer 1

The answer on Plato is C.) As hydrilla is aquatic in nature, the roots do not have to search for water, and there is no need for xylem to absorb water because the plant is surrounded by water.

Answer 2

Hydrilla is a hydrophyte, who have a characteristic of poorly developed root system because they are already surrounded by plenty of water and can absorb water anytime, from their surface. Further, this is why they lack a xylem tissue also. Xylem is required for water transport, which is a very easy task for hydrophytes, as they absorb water from their surface.