Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Zooflagellates – Protozoan
Zooflagellates are heterotrophs that are free living, commensals or symbiotic or parasitic in other animals. A number of species eg. Trichonynzpha and Myxotricha live within the gut of termites and digest cellulose that the wood-eating termites feed o but cannot digest for themselves.
Trichortympha lives as a mutualistic symbiont in the hindgut of wood-eating insects (termites and woodroaches). The anterior end of these large, complex flagellates (sometimes over 300 pm long) is covered with an elaborate pellicle and hundreds of flagella, but the posterior end extends pseudopods and ingests bits of wood. The flagellate is able to produce cellulose-digesting enzymes, but the insect host cannot; and therefore, depends on carbohydrates released by its symbionts.
Each time the insect molts, it loses the lining of the hindgut and all its symbionts. If it is unable to acquire new ones, it will starve to death, even though it continues to feed normally, for it cannot digest the wood. The flagellates are equally dependent on the mutualism and die within minutes outside the host. A young or newly-molted termite acquires symbionts by feeding directly from the anal opening of other termites in the colony. Myxotricha appears to be covered with flagella. But only four of these are true flagella and the others are a kind of bacteria or spirochetes (see margin remarks) attached to its surface. Their lashing movements enable the flagellate to swim about, and its own flagella help in steering.
Figure: Zooflagellates parasitic in the gut of termites.Other well known parasitic species of flagellates are Trypanosoma and Leishmania found in humans and cattle in Africa and Asia. Trypanosoma causes sleeping sickness in humans and nagana in cattle. The blood of the host is infected with the flagellate when the tsetse fly bites the host. Leishnamia is the agent for the widespread kala-azar and related disease. It affects the immune system and causes skin lesions among other effects. The host for this protozoan is the blood sucking sand fly.
Q. What is Aortic Enlargement ? Ascending Aorta: The ascending aorta, along with the SVC forms a portion of the right cardiac border on the PA view. After the age of about 40
Water is considered a universal solvent because- Select one: a. it can dissolve polar and non-polar compounds b. it can dissolve both positively and negatively charged ions a
Q. Concerning the number of hosts how are parasites classified? The Parasites that require only one host are called as monoxenous parasites. The Parasites that need more than o
disadv of protozoa
Q. What is inharmonious ecological interaction? The Inharmonious or negative ecological interaction is that in which at least one of the participating beings is harmed.
EMBRYOLOGICAL EVIDENCES - A comparative study of embryology of different groups of animals reveals certain features that provide evidences for organic evolution. There ar
Define the Factors that Affect the Rate of Drying? Factors that affect the rate of drying are as follow: 1) The fat content of the food-Higher fat contents generally result
How much physical activity is enough? Although it is difficult to prescribe the optimum amount of physical activity, it is important to note that any exercise programme has to
Explain the term Lipids? If somebody discovers that you have some knowledge of nutrition, you will be promptly shooted with two questions, first, "Oh! You really can tell how m
what is example of class,genus and species of platyhelminthes?
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd