Because Hydrilla being an aquatic plant absorbs water from free surface of entire plant body and need not to conduct water through xylem tissue.
Yes, lucky bamboo is not an aquatic plant and over time its roots will rot and die. It is best to plant it in soil with well drainage hole(s).
Plants grow from the roots and seeds germinate in the roots as well.
Well, it depends on what plant it is... But it is usually it's roots.
look
low growing, doesn't have great roots for absorption, like damp, shady places, lack well developed transport tubes
Roots on the upper parts of the plant are called adventitious roots. They are not real roots per se. In some plants, their role is to provide extra support to the plant, for example, maize. In other plants like orchids, the aerial roots function to attach the plant to a surface as well as absorb moisture from the air for the water requirement of the plant.
Well obviously the stem and or if not it wont be able to grow
Well if you have put citrus fruits or juices in your soil it may affect the roots. I have done this before, and my plant has died. The roots drink the citrus juice and it is not the right type of liquid for the roots. Only put citrus in the soil if its a big house plant.
they are the plant bodies with no well differentiated body design and are mainly aquatic. They are commonly called as algae.
Well, it damages the roots that absorb nutrients from the plant
Aquatic plants have adapted to life in the water by forming broader leaves with greater surface area to make up for having as many leaves. Additionally, they have formed extremely long stems, allowing them to still root, but reach the sunlight above.
Well,roots have tiny pores,so when water goes through the soil and reaches the roots,the pores absorb the water which circulate and go to other parts of the plant.