mutualism
Hydra20 is more stronger then hydra10
A Hydra is a mythical creature. Hydras aren't real.
mutalism
1v1 me irl
Hydra are in phylum Cnidarian group and sponges are in the phylum Porifera. The responsiveness of hydra is to external stimuli while sponges is more simple.
dip
The fertilization occurs externally
what is a hydra
Hydra or Hydra
An ameoba is a microscopic, blob-like protist, while a hydra is like coral or sea anemones.
No. Arthropods are members of the phylum Arthropoda; but hydrae are members of the phylum Cnidaria. The closest to a "common" term for animals in this phylum that exists is "cnidarians".
Hercules