Conjugation – protozoan, Biology

Assignment Help:

Conjugation – Protozoan

Conjugation is characteristic of ciliates. The details vary from species to species. The general features can be observed in Paramecium sps. which has one macronucleus and one micronucleus. Two ciliates ready for conjugation partially unite. The body surface and pellicle undergo considerable changes. The macronucleus disintegrates and the micronucleus divides twice to give rise to four haploid pronuclei. Three of these disintegrate and the fourth forms a stationary and a migratory pronucleu.

1976_Conjugation – Protozoan.png

Figure:  conjugation  in Paramecium caudatum

The latter moves into the other conjugant. The two organisms now separate and the pronuclei unite to form zygote. after several post conjugation divisions the macronucleus and micronucleus are formed restoring the normal nuclear complement.


Related Discussions:- Conjugation – protozoan

How does water move in sponges, Q How does water move in sponges? What is t...

Q How does water move in sponges? What is the function of the pores in these animals? Sponges are filtering beings they make water enter their bodies by their lateral pores. Wa

Define causes of iron deficiency anaemia, Define Causes of iron Deficiency ...

Define Causes of iron Deficiency Anaemia? Anaemia is a condition in which the blood cannot carry enough oxygen. This may be because there are fewer red blood cells than normal,

Define shell fish as a rich source of protein, Define Shell Fish as a rich ...

Define Shell Fish as a rich source of protein? Information on shellfish is fragmentary and incomplete. In shell fish, the shell comprises of a large portion of live weight of t

Haemodynamics, Haemodynamics :  The type of valves chosen should have exce...

Haemodynamics :  The type of valves chosen should have excellent haemodynamics. In studies at rest and on exercise the valve should produce only acceptable diastolic gradients in

Lead, Le a d It is common cause of poisoning in cattle. Lead poisonin...

Le a d It is common cause of poisoning in cattle. Lead poisoning in other species is limited by reduced accessibility, more selective eating habits, or lower susceptibility.

Explain some functions of riboflavin, Explain Some Functions of Riboflavin?...

Explain Some Functions of Riboflavin? Protective role: Riboflavin protects the octodermal tissues and prevents lesions  of the skin, eye and nervous system. Riboflavin amelior

What is alara, Question 1 Discuss the biological factors influencing ra...

Question 1 Discuss the biological factors influencing radioactivity Question 2 Explain the quality assurance of computed Tomography Question 3 Write short

Define protein-energy malnutrition - nutritional deficiency, Define Protein...

Define Protein-Energy malnutrition - Nutritional Deficiency? Even in normal times, PEM is a problem in many developing countries, most commonly affecting children between

What are the consequences of pem, What are the Consequences of PEM? Th...

What are the Consequences of PEM? The consequences of PEM are most often long lasting and irreversible. The common consequences include: • Irreversible growth retardation

Why is it dangerous to talk while eating, Q. Why is it dangerous to talk wh...

Q. Why is it dangerous to talk while eating? If a person talks when eating, food may be inhaled into the lungs. Generally after food is swallowed, it passes into pharynx and th

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

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!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd