Are Cnidoblasts used for Anchorage?
Assertion: Cnidoblasts are present on the tentacles and the body of the cnidarians. Reason: Cnidoblasts are used for the anchorage, defence and capture of the prey. … The phylum Coelenterata is also known as Cnidaria. They contain several cnidoblast cells in their body.
What are Cnidoblasts used for?
Cnidoblasts are used for anchorage, defence and capture of the prey.
How does cnidoblast help in Anchorage?
Answer: Cnidoblasts are specialized cell structures that are present in coelenterates that contain stinging cells called as nematocysts. It is coiled threadlike structure, which helps to capture, anchorage prey. It contains poison that paralyzes the prey and it helps to hold them easily.
Which animals Cnidoblasts injects the toxin in the body?
Examples: Corals, Sea anemones, Jellyfish etc.
What is the meaning of Anchorage in zoology?
(Science: cell biology) attachment, not necessarily adhesive in character, because the mechanism is not assumed the term ought to be more widely used.
When a cnidarian is attached to something it is called?
Polyps that remain physically attached to one another or embedded in a common mass of tissue constitute a colony. In some colonies, polyps share a common coelenteron through which food captured by any member is distributed to others. Hydrozoan polyp colonies, called hydroids, are prostrate, bushy, or feathery in form.
Who has Cnidoblast in their body?
– Cnidoblasts are cells which grow into mature, specialized structures called cnidocytes. Cnidocytes are cells of cnidarians (jellyfishes, sea anemones, corals, hydrae, etc.) that shoot off threadlike, frequently poisonous, tubules to capture prey and ward off enemies.
Which is absent in ctenophora?
“Which is a absent in ctenophores?” Medusa phase.
What is Hypostome in Cnidaria?
hypostome”: in cnidarians, the circular raised area of a hydrozoan polyp that lies between the tentacles and the mouth. The term is also used to describe mouthparts in other phyla.
How do Coelenterates reproduce?
In Coelenterates reproduction occurs both by asexual as well as sexual methods. Asexual reproduction: They reproduce asexually by the formation of buds on its surface. Afterward, it separates from the parent and grows into a new individual.
Which is a Coelenterate?
coelenterate. / (sɪˈlɛntəˌreɪt, -rɪt) / noun. any invertebrate of the phylum Cnidaria (formerly Coelenterata), having a saclike body with a single opening (mouth), which occurs in polyp and medusa forms. Coelenterates include the hydra, jellyfishes, sea anemones, and corals.
What makes Cnidoblast unique?
The most unusual characteristics of this Phylum are the nettlelike stinging nematocysts — poison dartlike microscopic hairs used to capture prey. … Inside each cnidoblast is a coiled thread, a nematocyst, which explodes out of the cell. Only those nematocysts located in the stimulated area are discharged.