Table of Contents
What is the function of the trichocysts in the Paramecium?
The trichocysts defend Paramecium against D. margaritifer. Thus, trichocysts in Paramecium serve as defensive organelles against several predators.
What is the main function of trichocysts?
It is thought that the function of trichocysts is to repel predators, though the evidence for this is not very clear. Trichocysts are found in ciliates and in dinoflagellates and other flagellate groups (Hausmann and Hülsmann, 1996).
What is the function of Macronucleus in Paramecium?
The macronucleus is the centre of all metabolic activities of the organism. The micronucleus is a storage site for the germline genetic material of the organism. It gives rise to the macronucleus and is responsible for the genetic reorganization that occurs during conjugation (cross-fertilization).
Where is Trichocyst seen what is its function Class 11?
Trichocysts are found in tetrahymena and the cilia pathway in several metabolic pathways. The cavities of certain ciliates and flagellates like paramoecium contain trichocysts. In the conditions of threat by the predators, trichocysts are ejected from the cell surface and are used for defense.
What organisms have Trichocysts?
A trichocyst is an organelle found in certain ciliates and dinoflagellates.
Why is Paramecium called Infusorian?
Paramecium is a genus of infusoria protista (so-called because they live in waters that were once rich in flowers and hay in infusion). In traditional classification these are considered protozoa belonging to the class of ciliates.
What is a Toxicyst?
toxicyst In certain protozoa, an organelle which resembles a trichocyst but in which the filament carries a poison that can kill other protozoa. Toxicysts are used for capturing prey.
What makes Paramecium unique?
Perhaps the most unusual characteristic of paramecia is their nuclei. “Paramecium along with the other ciliates have this rather unique feature,” said James Forney, a professor of biochemistry at Purdue University. “They have two types of nuclei, which differ in their shape, their content and function.”
What is the function of oral groove?
The oral groove present in the Paramecium is lined with cilia. It helps Paramecium to gather food and direct it in the mouth.
How is food ingested in paramecium?
The paramecium is a unicellular protist that uses its cilia to pull food into its oral groove. Food particles are then digested via a process called phagocytosis.
Do ciliates have Trichocysts?
A trichocyst is an organelle found in certain ciliates and dinoflagellates. A trichocyst can be found in tetrahymena and along cila pathways of several metabolic systems. Filamentous trichocysts in Paramecium and other ciliates are discharged as filaments composed of a cross-striated shaft and a tip.
What is the Oral Groove?
A ciliated channel found in certain protozoa and aquatic invertebrates down which food is directed into the mouth.