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.
Zoochory - Dispersal of Seeds Some fruits are eaten by animals and the seeds are passed out with the excreta (endozoochory). Plums, Lantana, grapes, figs and guava are example
How does the sexual arousal mechanism in women facilitate fecundation? During sexual arousal in women the vagina secretes substances to neutralize its acidity therefore allowin
Which of the following is a true statement regarding the process of RNA editing? A. RNA editing alters the sequence of the mRNA message thereby permitting for an enhance in pro
Q. Importance of counselling for diabetic patient? Diabetes is a life-long illness. Life style modification and precautions taken by the patient can prevent complications and i
Describe the Male Reproductive System? In addition to the primary sex organs, the testes, there are accessory structures that store, nourish, and activate the sperm, and conduc
Which are the three parts of the small intestine? The small intestine is separated into three portions: duodenum, jejunum and ileum. Digestion System - Image Diversity: smal
All of the following illustrate why the bile acids are much better suited then cholesterol for use as emulsification agents for fats except: -cholesterol contains a hydroxyl gro
#q1. If offspring exhibit a 3:1 phenotypic ratio, what are the genotypes of a parent?uestion..
Ernst Mayr, for whom, species and species problem have been the main concern of research, points out that speciation, the multiplication of species, that is division of one parent
The mathematical, statistical and computing methods that aim to resolve biological queries using DNA and amino acid sequences and related information is called as Bioinformatics.
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