Predation and coevolution, Biology

You now know that natural seleqtion aims at evolving adaptations of organisms in response to environmental changes in the inanimate world. Also many adaptations arise due to interaction with or as a response to the presence of other organisms in the environment. So far we discussed the evolution of such interactions and adaptations between closely related species which wore or less occupy the same level in the food chain. Such interspecific interactions may also occur between organisms at different lkvels in the food chain. The evolution of adaptations in response to such interactions has been largely responsible for the development of various associations be it commensalism, mutalism, parasitism or predation. For instance, the claws, teeth, speed etc., found in carnivores are adaptations evolved in response to the kind of prey species which makes up their diet. Similarly, the toxins, protective coloration I and chemical warfare devices are the adaptations evolved by the prey species to escape from the evil designs of the predator. Also selection is able to maintain and adjust the rate of reproduction of the prey species to that of predators. In short, interspecific relationships are a direct result of the coordination of the evolution of ecologically related species by the natural selection process. Very interestingly, of the two species that are involved in the evolution of such relationships, each one acts as the mutual agent of selection for the other. It is this process that is known as coevolution. In this section, we shall be analysing prey-predator, plant-herbivore and host-parasite relationships as coevolutionary processes.

Posted Date: 4/5/2013 6:10:50 AM | Location : United States







Related Discussions:- Predation and coevolution, Assignment Help, Ask Question on Predation and coevolution, Get Answer, Expert's Help, Predation and coevolution Discussions

Write discussion on Predation and coevolution
Your posts are moderated
Related Questions
What is the difference between homozygosity and heterozygosity? Homozygosity happens when an individual has two identical alleles of a gene, for instance, AA or aa. Heterozygos

N a ture of viral diseases Viral diseases are manifested in acute, sub-acute or chronic forms, as frank clinical cases or as latent infections, some of which are fatal. Thes

Explain about the optic disc The optic disc is also called a blind spot while the macula is referred to as the yellow spot. The ora serrata (the intersection between the retina

The cerebrum is clearly the most interesting part of the brain from the point of view of cognitive neuroscience. The cerebrum consists of highly symmetrical left and right hemisphe

Q. In which areas of the globe is gymnosperm abundance noteworthy? These plants are the typical vegetation of cold regions like the boreal forest or taiga of the northern hemis

Most dental offices have a designated area for instrument reprocessing that is separate from the dental treatment room. This is ideal, since cleaning, sterilizing and storing instr

Question 1 Is expression of cloned gene always a success? How does the method of molecular photo copying work? Question 2 Explain the control of gene expression with the exam

Mixed Mitral Stenosis and Regurgitation The most common cause for a combined lesion is rheumatic, Very rarely; it could be of congenital origin. Regurgitation in a stenotic val

Under which forms is the Trypanosoma cruzi found in its hosts? In the definitive hosts as well as in triatomine bugs (middle hosts) the protozoan that causes Chagas' disease ch

What are some economic applications that can be generated by very biodiverse ecosystems? Very biodiverse areas show enormous economic potential. They can be a source of raw mat