Advantages of metagenesis in cnidaria, Biology

Advantages of Metagenesis in Cnidaria

In this you have studied that a huge number of Cnidarian colonies are polymorphic and exhibit alternation of generations. This changes of generation or metagenesis confers tremendous advantages for the specific species.

a) Proximate (immediate) Benefits

i) Metagenesis gives alternative method of reproduction, asexual and sexual, in case either one fails to work.

ii) Sessile (attached to the substratum) forms such as Obelia produce free moving medusae as part of metagenesis. This allows wider distribution of species, which in turn improves the chances of exploring and finding better shelter, food and environment.

 iii) Metagenetic animals escape adverse climatic conditions through changing from one body form to the other body form.

b) Ultimate Benefits

Continuous asexual reproduction causes genetic homogeneity. To avoid this, alternate sexual forms permit cross fertilization mixing of genetic material and variation which is good for species survival and evolution. In addition to Cnidarians, polymorphism is clearly seen between certain, orders of the Class Insecta of Phylum Arthropods.

Posted Date: 2/4/2013 1:38:29 AM | Location : United States





what are some of the disadvantages?
Posted by Jack | Posted Date: 7/2/2013 8:00:53 PM


Related Discussions:- Advantages of metagenesis in cnidaria, Assignment Help, Ask Question on Advantages of metagenesis in cnidaria, Get Answer, Expert's Help, Advantages of metagenesis in cnidaria Discussions

Write discussion on Advantages of metagenesis in cnidaria
Your posts are moderated
Related Questions
MORPHOLOGICAL AND ANATOMICAL EVIDENCES - (i ) HOMOLOGOUS ORGANS - The organs apparently similar or dissimilar in structure and function, but of similar embryonic origi

What is meant when it is said that a virus is in an inactive state? Viruses considered in inactive state are those whose genetic material is within host cells without synthesis

Explain the Disadvantages of tissue punch - There is a loss of keratini-ed tissue and this can lead to a compromised soft tissue barrier in cases where there is deficiency of a

Q. What is counselling for diabetic patient? The word counselling has been understood in a number of ways. Counselling can be understood as "consultation, mutual interchange

Cellular level - Level of body organization The next higher level of organization is the cellular level. This is really an aggregation of cells that are functionally different

What are Cytokines? Cytokines are polypeptides, which influence the proliferation, differentiation, metabolism and activation of cells. There are three areas in cancer that hav

Q. Are there non viral hepatitides? The Hepatitis is a generic name for inflammation of the liver and there are bacterial hepatitides, for instance, in lepstopirosis, and toxic

Organisational Behaviour of Health Care The insights provided by the theories of organisational behaviour emphasise the need for the establishment of institutional frameworks

Q. Type specimen of class enteropneusta? Examine the specimen and note the following features: 1. Balanoglossus has a soft, elongated, worm-like body which has a ciliated surf

Q. Selection of foods for diabetic patients? Some handy guidelines for selection of foods for diabetic patients is presented next. You may be aware that some foods need to be