Fertilisation in oviparous aquatic animals and terrestrial animals
Classified in Biology
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Porifera – sponges
•the
Simplest multicellular animals
•Assymetrical
•are
Sessile (do not move) and live in the water
Cnidaria – jellyfish, corals, hydra and sea anemones
•aquatic
Animals
•have
A gastrovascular
Cavity
•Some
Have radial symmetrical
Platyhelminthes – flat worms
•have
A soft, flat body (unsegmented)
•bilaterally
Symmetrical
•live
In water
Annelida – worms And leeches
•segmented
Bodies (divided into sections separated by rings)
•have
A mouth and an anus
•bilaterally
Symmetrical
Mollusca – snails, slugs, clams, squids, octopus
•most Are aquatic
•unsegmented Bodies
•asymmetrical
•many
Have shells