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

Etiological factor of dyspepsia, Q. Etiological factor of dyspepsia? Th...

Q. Etiological factor of dyspepsia? The main etiological factor of dyspepsia is the failure of proper digestion and absorption of food in the alimentary tract and the consequen

Biological species concept, Q. Biological species concept? A biological...

Q. Biological species concept? A biological species as defined by Ernst Mayr are "groups of actually or potentially interbreeding natural populations which are reproductively

Explain plant sources of natural colourants, Plant sources Although the...

Plant sources Although there is a multitude of colours in the plant kingdom, their extraction and use in food systems is not an easy task. Unless the colourants have some outst

Explain glomerular filtration in human nephrons, A horticulturist keeps Chr...

A horticulturist keeps Chrysanthemum plants in short-day conditions during long-day season. State its effect on flowering. Specify the role of phytochrome included. Explain glom

Define can or receptacle and labeling and packing, Define Can or receptacle...

Define Can or receptacle and Labeling and packing? Can/receptacle - This may be performed manually or by using sophisticated filling machinery. The ratio of liquid to solid in

Pyruvate dehydrogenase complex, Pyruvate Dehydrogenase Complex The Pyru...

Pyruvate Dehydrogenase Complex The Pyruvate Dehydrogenase Complex (PDC) is one of the single central enzymes of aerobic metabolism. After completion of this animation you shoul

Volvox Colonial Existence, Necessity of interdependence of Volvox organisms...

Necessity of interdependence of Volvox organisms in the colonial existence

Why cerebellum more developed in mammals that fly or jump, Q. Why is the ce...

Q. Why is the cerebellum more developed in mammals that fly or jump? The cerebellum is the main brain structure that coordinates the movement and the equilibrium of the body. F

What percentage of the individuals are themselves dihybrid, In the offsprin...

In the offspring of a dihybrid self, what percentage of the individuals are themselves dihybrid?

Explain the composition of sabouraud agar - culture media, Explain the Comp...

Explain the Composition of Sabouraud Agar? Sabouraud agar is used for cultivation of yeasts and moulds. Peptone - 10.0 gm Dextrose - 40.0 gm Agar - 15.0 gm Distille

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