what are the sailent features of phylum coelentrate give examples
Answers
Answer:
MARK AS BRAINLIEST.....
Explanation:
General characteristics of Phylum Coelenterata
•Kingdom: Animalia
•Habitat: aquatic, mostly marine.
•Habit: solitary or colonial. Each individual is known as zooid.
•Symmetry: radially symmetrical
•Grade of organization: tissue grade of organization.
•Germ layer: diploblastic, outer ectoderm and inner endoderm. Mesogloea separates these two layer
•The body has a single opening called hypostome urrounded by sensor y tentacles.
•Coelom: gastrovascular cavity or coelenteron.
•Nematocyst: organ for capturing and paralyzing pray, present in tentacles
•Nutrition: holozoic
•Digestion is both intracellular and extracellular.
•Respiration and excretion are accomplished by simple diffusion.
•Circulatory system: absent
•Nervous system: poorly develop
•Many forms exhibit polymorphism ie. Polyp and medusa
•Polyps are sessile, asexual stage
•Medusa are free swimming, sexual stage
Metagenesis: asexual polypoid generation alternate with sexual medusoid generation
•Reproduction:
☆Asexual: by budding
☆Sexual: by gamatic fusion
•Fertilization: internal or external
•Development: indirect with larval stage
(Koilos: hollow, enteron: cavity)
Thankyou.........
Answer:
in coelentrate a two layered body wall encloses a single cavity known as coelentron in which digestion takes place . the cavity opens by a mouth at one end only.there are tentacles to catch food organisms .they are mostly found in water(mostly in sea,very few in fresh) .corals develop hard skeletons made up of calcium carborate from their secretions(but these are not bones)
mark this as brainliests answer and five stars