Is development direct or indirect in Coelenterata?

Indirect development takes place in coelenterata.

Which type of development is seen in Coelenterates?

Coelenterata is a term encompassing the animal phyla Cnidaria (coral animals, true jellies, sea anemones, sea pens, and their allies) and Ctenophora (comb jellies). The name comes from Ancient Greek: κοῖλος, romanized: koilos, lit….References.

Is development direct or indirect in cnidaria?

Cnidarians and sponges also have their own version of indirect development through non-feeding larval stages (figure 2c).

Is development direct or indirect in class chondrichthyes?

Answers. In Chondrichthyes development is indirect because it involves larval stages in development.

Which type of development is seen in cnidaria?

Phylum Cnidaria includes animals that show radial or biradial symmetry and are diploblastic: they develop from two embryonic layers. Nearly all (about 99 percent) cnidarians are marine species.

What is direct development and indirect development?

Note: A direct development is a type of development in which a young is directly born as a small version of an adult and it develops into a mature individual without undergoing metamorphosis. Whereas, in indirect development, larva is hatched from the egg. Larva then metamorphosed to an adult.

Which type of fertilization is present in Coelenterata?

Dear student, Cnidarians or coelentrates are hermaphrophites. Some of the species are capable of self-fertilization. Otherwise, the gametes are generally shed into the sea(external fertilization), where the eggs are fertilized.

What is the development in cnidaria?

Phylum Cnidaria includes animals that show radial or biradial symmetry and are diploblastic: they develop from two embryonic layers. When touched, the cells are known to fire coiled threads that can either penetrate the flesh of the prey or predators of cnidarians, or ensnare it.

What is direct development in animals?

If an animal after birth or emergence from an egg differs from the adult in comparatively minor details (apart from not having functional sex organs), the development is said to be direct. There is no larval stage and no metamorphosis.

What is indirect development example?

It is a type of development an animal born is different from the adult form. Animals that experience indirect development have very little yolk and due to the small amount of yolk, the larva develops and hatches rapidly. Amphibians, some echinoderms and some arthropods such as insects undergo indirect development.

What is indirect development Name an animal which develops indirectly?

Some echinoderms, amphibians and insects undergo indirect development: butterflies, dragonflies, frogs and so forth. The larva or young form of these creatures often fulfill a different ecological niche than the adult animal does.

Are sexes separate in Coelenterates?

Looking into their sexuality most of the organisms belonging to this phyla appear to be gonochorists/ unisexual with exceptions of few hermaphrodites. They are capable of undergoing both sexual and asexual reproduction along with other means like budding and regeneration.

What is the development of coelenterata?

The development of Coelenterata is indirect with larval stage. Coelenterata is a term encompassing the animal phyla Cnidaria and Ctenophora. The name comes from Ancient Greek: κοῖλος, romanized: koilos, lit. ‘hollow’ and ἔντερον, enteron, ‘intestine’, referring to the hollow body cavity common to these two phyla.

What kind of fertilization present in Coelenterata – external or internal?

Mostly external but in few species like hydra have internal fertilization Coelenterates shows both internal and external fertilisation….. This discussion on What kind of fertilization present in coelenterata – external or internal? is done on EduRev Study Group by NEET Students.

What are the characteristics of cnidaria Coelenterata?

Phylum Cnidaria/Coelenterata: General Characteristic and Classification. General characteristics of Phylum Coelenterata. Kingdom: Animalia. Habitat: aquatic, mostly marine. Habit: solitary or colonial. Each individual is known as zooid. Symmetry: radially symmetrical.

What are the classes of the phylum coelenterate?

The phylum coelenterate is divided into three classes on the basis of development of zooids: Class1: Hydrozoa Class2: Scyphozoan or Scyphomedusae Class3: Anthozoa or Actinozoa