Question

which phylum do the following animals belong to?give one important feature of each phylum.​

Answer 1

Explanation:

The four distinctive characteristics that, taken together, set chordates apart form all other phyla are the notochord; single, dorsal, tubular nerve cord; pharyngeal pouches; and postanal propulsive tail.

Answer 2

Kingdom Animalia is divided into eleven major phylums.

1. Phylum Porifera

• Primitive multicellular organisms with cellular level of organisation
• They are generally marine and asymmetrical
• Examples: Sycon, Spongilla, etc.

2. Phylum - Colenterata (Cnidaria)

• They are aquatic, mostly marine, sessile or free-swimming.
• Radially symmetrical animals
• Examples: Physalia, Adamsia, etc.

3. Phylum - Ctenophora

• Reproduction takes place only by sexual means.
• Fertilisation is external with indirect development.
• Examples: Pleurobrachia and Ctenoplana

4. Phylum – Platyhelminthes.

• Fertilisation is internal and development is through many larval stages.
• Some members like Planaria possess high regeneration capacity.
• Examples: Taenia (Tapeworm), Fasciola (Liver fluke).

5. Phylum – Aschelminthes

• Often females are longer than males.
• Fertilisation is internal and development may be direct (the young ones resemble the adult) or indirect.
• Examples: Ascaris (Round Worm), Wuchereria (Filaria worm), Ancylostoma (Hookworm).

6. Phylum – Annelida

• Osmoregulation and excretion are done through nephridia.
• Reproduction is sexual.
• Examples: Nereis, Pheretima (Earthworm) and Hirudinaria (Blood sucking leech).

7. Phylum – Arthropoda

• Largest phylum, includes insects
• Development may be direct or indirect.
• Examples: Apis (Honey bee), Laccifer (Lac insect), Anopheles, Culex and Aedes (Mosquitoes)

8. Phylum – Mollusca

• Terrestrial or aquatic (marine or fresh water)
• Have an organ-system level of organisation.
• Examples: Pila (Apple snail), Pinctada (Pearl oyster), Sepia (Cuttlefish), etc.

9. Phylum – Echinodermata

• They are called Echinodermata because they have endoskeleton of calcareous ossicles.

• Examples: Asterias (Star fish), Echinus (Sea urchin), etc.

10. Phylum – Hemichordata

• It consists of a small group of worm-like marine animals.
• Organ-system level of organisation
• Examples: Balanoglossus and Saccoglossus

11. Phylum – Chordata

• Possess a notochord, a dorsalhollow nerve cord and paired pharyngeal
• Closed circulatory system
• Examples: Ascidia, Scoliodon