A.Water-fleas
B.Bacteria
C.Fishes
D.Frog tadpoles
Related Mcqs:
- Hydra feeds upon:
- Hydra egests undigested food residues through:
- The presence of high coliform counts in water indicates __________?
- Which of the following fishes excrete large volume of diluted urine??
- The food of hydra consists of___________??
- An association mutually beneficial to both partners is represented by:
- Excretory substance is ammonia in:
- Hydra is:
- Scolidon or dog fish belong to the group of fishes called__________??
- Ctenidia are used for food collection in:
