write the features of phylumqnnelida and echinoderamata with example
Answers
Answer:
Echinoderms are animals that you must be knowing. If you know a starfish, then you are well aware of what an echinoderm is. Echinoderms are animals that are invertebrates. The name actually means spiny skin! All the animals in this phylum exhibit spiny skin and hence are grouped together. Let us find out more about them.
Explanation:
If you have an avid interest in gardening, you must have surely come across earthworms. Did you know one can find one million earthworms in just one acre of land? These earthworms belong to the Phylum Annelida. They create healthy soil and plants grow extremely well in these types of soils.
Phylum Annelida
Having over 17,000 species, Phylum Annelida is a large phylum. Annelids are also known as ringworms or segmented worms. They exist in various environments including marine waters, fresh waters and also in moist terrestrial areas. The size of the annelids can range from a few millimetres to an amazing three metres in length. The Australian earthworm measures around 3 metres. Furthermore some species from this phylum exhibit some unique shapes and brilliant colours.
Annelids exhibit bilateral symmetry and are invertebrate organisms. They are coelomate and triploblastic. The body is segmented which is the most distinguishing feature of annelids
Echinodermata
They have a star-like appearance and are spherical or elongated.
They are exclusively marine animals.
The organisms are spiny-skinned.
They exhibit organ level of organization.
They are triploblastic and have a coelomic cavity.
The skeleton is made up of calcium carbonate