Mechanisms of speciation, Biology

Assignment Help:

In the previous section we discussed the concept of species in detail and concluded that the concept of biological species and Mayr's definition of species have a wide acceptance among biologists. In this section we shall proceed to discuss the mechanisms of speciation or the mode of formation of a species. Mayr's definition of species amply makes it clear that to qualify for the title of the species, the individuals must be reproductively isolated from other groups. This naturally raises a question whether a new species could arise from populations occupying the same territory. In other words, should the populations of parent species live in quite separate territories in the formation of new species? In our earlier discussions. on natural selection, you have learnt that originmof adaptations is a gradual process, This is much more true of speciation. Biologists recognise three different kinds of speciation.


Related Discussions:- Mechanisms of speciation

Define procedure for measurement of ph, Define Procedure for Measurement of...

Define Procedure for Measurement of pH? To ensure reliability of the pH readings, you should first calibrate the pH meter. You should adjust the pH meter so that the readings a

Flowering - development of plant, Flowering - Development of plant One...

Flowering - Development of plant One of the major changes that occur during the life cycle of a plant is the transition from vegetative stage to the flowering stage. In this t

Intraspecific and interspecific competition, In the preceding block you lea...

In the preceding block you learnt the Darwinian premise of natural selection based on certain facts and deductions thereof. You would have noticed that one of the foundations for t

What are primary consumers, What are primary consumers? Can a food chain pr...

What are primary consumers? Can a food chain present quaternary consumers without having secondary or tertiary consumers? Can a tertiary consumer of one chain be a primary or secon

How is water importance to life, How is water's importance to life reflecte...

How is water's importance to life reflected in the normal range of internal pH values that living things are likely to have?

Neurosecretory cells and neurosecretion, Neurosecretory Cells and Neurosecr...

Neurosecretory Cells and Neurosecretion We have before said that the neurosecretory cells are an important component of the non- chordate endocrine system. Of course, they are

Types of ecosystem, Ecosystems are so varied in form and structure that wha...

Ecosystems are so varied in form and structure that whatever has a distinct community of its own, can be called an ecosystem eg. A crop field, grass land, barks etc. all the ecosys

Define the axons of all the baroreceptors in the body, The axons of all the...

The axons of all the baroreceptors in the body were destroyed at 2 AM. All else is normal.  Which of the following statements is true for the system at 2:10 AM when compared to the

How do malign neoplasias appear, Q. How do malign neoplasias appear? Th...

Q. How do malign neoplasias appear? The Neoplasias appear due to DNA mutations in genes that regulate the cellular proliferation thus making the cell lose its capacity to contr

What are the disadvantages of ridgemapping, Disadvantages of Ridgemapping ...

Disadvantages of Ridgemapping  a) Traumatic procedure b) Time consuming procedure and needs more armamentarium c)  There is an inherent risk of inaccuracy especially whil

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