What is trichocyst function?
After a series of experiments, it was concluded that the function of trichocyst in Paramecium is mainly of a defensive nature. The trichocysts defend Paramecium against D. margaritifer. Thus, trichocysts in Paramecium serve as defensive organelles against several predators.
Where is trichocyst seen what is its function?
A trichocyst can be found in tetrahymena and along cila pathways of several metabolic systems. It is also a structure in the cortex of certain ciliate and flagellate protozoans consisting of a cavity and long, thin threads that can be ejected in response to certain stimuli.
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. A Dictionary of Zoology.
Do dinoflagellates have trichocysts?
Trichocysts are a common cell organelle of ciliates and dinoflagellates. They are composed of trichocyst matrix proteins and have been intensely investigated and characterized in ciliates. Here, for the first time, data have been obtained for trichocyst matrix proteins of a dinoflagellate.
Which are parts of trichocyst?
trichocyst, a structure in the cortex of certain ciliate and flagellate protozoans consisting of a cavity and long, thin threads that can be ejected in response to certain stimuli.
What is a Cytoproct in biology?
The anal pore or cytoproct is a structure in various single-celled eukaryotes where waste is ejected after the nutrients from food have been absorbed into the cytoplasm.
In which of the following trichocyst is present?
So, the correct answer is ‘Paramecium’ Was this answer helpful?
What does a micronucleus do?
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).
Are parts of trichocyst?
trichocyst, a structure in the cortex of certain ciliate and flagellate protozoans consisting of a cavity and long, thin threads that can be ejected in response to certain stimuli. Trichocysts may be widely distributed over an organism or restricted to certain areas (e.g., tentacles, papillae, around the mouth).
What is unique about dinoflagellates?
Dinoflagellates (Division or Phylum Pyrrhophyta) are a group of primarily unicellular organisms united by a suite of unique characteristics, including flagellar insertion, pigmentation, organelles, and features of the nucleus, that distinguishes them from other groups.
What is the function of macronucleus?
A macronucleus (formerly also meganucleus) is the larger type of nucleus in ciliates. Macronuclei are polyploid and undergo direct division without mitosis. It controls the non-reproductive cell functions, such as metabolism.
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).
What does the micronucleus do?
protozoans. In contrast, the micronucleus is germinal (responsible for transfer of genetic information during sexual reproduction) and diploid.
What is the role of Cytopyge?
Cytopyge is a fixed point for waste discharge in the body of a protozoan, especially a ciliate.
Where is trichocyst found?
Trichocysts are found in ciliates and in dinoflagellates and other flagellate groups (Hausmann and Hülsmann, 1996).
What is the function of macronucleus and micronucleus?
What’s the difference between a macro and a micronucleus?
These two nuclei are the macronucleus and micronucleus. They contain separate genomes. The macronucleus is the larger one that controls the metabolism of the ciliate protozoa while micronucleus is the smaller one that carries out reproductive functions and generates the macronucleus.
What are dinoflagellates made up of?
Dinoflagellates are unicellular flagellated algae belonging to the phylum Pyrrophyta. Their cells contain chlorophylls a and c. They occur in both freshwater and marine habitats. A typical representative is Gonyaulax (also referred as red dinoflagellates).
What group do dinoflagellates belong to?
Dinoflagellates and their cysts belong to the Division Pyrrhophyta (literally “fire plants”), Class Dinophycaea, the related Class Ebriophyceae (also in the Division Pyrrhophyta) includes the ebridians which have internal siliceous skeletons, are extant and have a fossil record beginning in the Palaeocene.