Question

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

Answer 1

because they are surrounded by plenty of water and can absorb water any time from their surface

Answer 2

"Hydrilla is an aquatic plant which has poorly developed roots because being an aquatic plant; hydrilla does not need to have well-developed roots to take in water as it is accessible and reading available.

This is the same reason why its xylem is absent because xylem is a conducting tissue which conducts water but the plant doesn't need it 

"