Question

How is hydrilla able to survive underwater?

Answer 1

Hydrilla is a perennial plant that forms dense colonies and can grow to the surface in water over 20 feet deep. Hydrilla branches profusely and after reaching the surface it extends across it forming thick mats. Hydrilla can reproduce by fragmentation, from seeds, from turions (axilary buds), and from tubers. Leaves are blade-like about 1/8 inch and 3/8 inch long with small tooth margins and spines on the underside of the midrib which make them feel rough. Leaves are usually 4 to 8 in a whorl.
Hydrilla has a high resistance to salinity compared to many other freshwater associated aquatic plants.

Answer 2

Answer:

hydrilla is able to survive .

Explanation:

it has thick waxy coating outside its leaves to prevent water loss and so that it can float easily in water.