Flightless birds, Biology

Assignment Help:
#Most of the world''s flightless birds are either nocturnal and secretive (e.g. the kagu) or large, swift and well-armed (the ostrich). The exceptions are found primarily on islands, and many of these island species have become extinct with the arrival of humans and their domestic animals.

What special biogeographical conditions on islands might permit the survival of flightless birds? Why has the colonization so often resulted in the extinction of such birds? The power of flight has been lost secondarily in representatives of many groups of birds; what are some possible evolutionary advantages of flightlessness that might offset its obvious disadvantages?

Related Discussions:- Flightless birds

How can asexual reproduction in planarias be described, How can asexual rep...

How can asexual reproduction in planarias be described? Planarias can separate themselves asexually by transversal bipartition because of the great regeneration capability of t

Assume complete absorption, How many pints (473 ml) of Fat Tire amber ale c...

How many pints (473 ml) of Fat Tire amber ale can an 80 kg person drink in Arizona before reaching the blood alcohol limit? Fat Tire's ethanol concentration of 5.3% (v/v). Assume c

Show the signs and symptoms of implant failure, Q. Show the Signs and sympt...

Q. Show the Signs and symptoms of implant failure? Signs and symptoms of implant failure are : 1.  Horizontal mobility beyond 0.5 mm or any clinically observed vertical move

Pericardiocentesis-types of surgery, Pericardiocentesis :  This is us...

Pericardiocentesis :  This is usually done by the cardiologist. It is better done with ECG and haemodynamic monitoring. Subxyphoid route is preferred with the patient positio

How does chewing food help to speed up digestion, How does chewing food hel...

How does chewing food help to speed up digestion? Chewing reduces food to portions small sufficient to be swallowed and enhances the surface area of the food for digestive enzy

Vegetative development - development, Vegetative Development - Development ...

Vegetative Development - Development The process of growth and differentiation of cells into organs and organisms is often termed development. For example, the development of

Foot-rot, Foot-rot Foot-rot is a term applied to the condition of feet ...

Foot-rot Foot-rot is a term applied to the condition of feet of cattle, sheep, goats and sometimes pigs. It is characterized by inflammation, necrosis and ulceration of underly

Bacterial and mycotic diseases, Bacterial and Mycotic Diseases Bacteria...

Bacterial and Mycotic Diseases Bacteria and fungi are microscopic organisms which are ubiquitous in nature and are widely present in soil, fresh and salt water, air, vegetation

Explain about gelation, Gelation Agar gels can be formed in very dilute...

Gelation Agar gels can be formed in very dilute solutions containing a fraction of 1% agar. In fact gelation is perceptible at concentrations as low as 0.04%. These gels are ri

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