A. azolla
B. wolffia
C. eichornia
D. trapa
Related Mcqs:
- In an aquatic ecosystem, the depth to which light penetrates is called __________?
- Worlds biggest irrigation scheme ??
- Which country built worlds largest data centre radio telescope ______??
- The simplest aquatic ecosystem can be seen in a ____________.
- Aquatic life is damaged by_______________?
- Which of the following is perennial weed?
- A weed that spreads asthma is:
- Cuscuta is an objectional weed of:
- The one which is a weed killer is___________??
- In an aquatic ecosystem, the tropic level equivalent to cows in grasslands is ____________.
