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.
What are the target organs upon which insulin and glucagon act? Glucagon mostly acts upon the liver. Insulin acts in general upon all cells. Both also act upon the adipose tiss
What does genetics have to do with biology? Genetics is the study of the genes found in genetic material (ex. DNA). DNA is found in the nucleus of your cells. The most signific
Maturation and adaptation: (18 to 54 weeks) The final stage involves maturation and adaptation of the implant-bone interface, peri-implant bone and the entire implant supportin
Q. Illustrate Omega Taxonomy? After synthesising a basic classification, the taxonomist can attempt to improve upon it. Therefore, the observed facts are interpreted in Omega t
Q. What are compound eyes? Arthropods have compound eyes made of several visual units called as ommatidia. Each ommatidium transmits visual information through the optic nerve
Explain the effect on Minerals of the Human milk? There appears to be no relationship between dietary intake and concentrations in milk for copper, iron or zinc. Iron supplemen
example of pisces
What is ribose Browning in canned fish is commonly associated with ribose. Undesirable colour changes in shellfish during canning often involve metal ions, for example, the bl
Determine Food Sources of Zinc? Zinc is normally associated with the protein and/or nucleic acid fraction of foods. Thus, foods high in proteins are good sources of zinc. Lean
Explain Procedure for Sub-Culturing of a Culture Now carry out the exercise following the steps given herewith: 1. Sterilize the inoculating loop and needle by heating to re
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