Cnidarians are found in aquatic environments and possess two embryonic germ layers.
Cnidarians belong to the phylum Cnidaria and contain diverse organisms of more than 9000 species.
Cnidaria originates from Greek word "cnidos," which implies stinging nettle.
Over 11000 species of marine and freshwater environments accommodate in this group and is categorized under kingdom Animalia.
In order to capture a prey, special types of cells are present in them called 'cnidocytes'.
In sum, this phylum contains soft-bodied animals which includes jelly fish, sea anemones and corals.
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The geologic time scale is a record of THE GEOLOGIC EVENTS AND THE EVOLUTION OF LIFE FORMS as shown in the fossil record.
true or false: True.
Answer:
Origin. 20 out of the 36 body plans originated in the Cambrian period, in the "Cambrian explosion", However, complete body plans of many phyla emerged much later, in the Palaeozoic or beyond.
From left to right: Photosynthesis , Respiration
