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

Polarity - root and shoot morphogenesis, Polarity - Root and Shoot Morphoge...

Polarity - Root and Shoot Morphogenesis Polarity is defined as having a difference (morphological, physiological or both) between the two ends of an axis or cells. This is lar

Dermato phytoses, Dermato phytoses Dermatophytosis (ringworm) is a cos...

Dermato phytoses Dermatophytosis (ringworm) is a cosmopolitan, superficial and highly contagious disease of man, animals and birds. The infection is caused by fungi of three g

What is primary structure of a protein, Q. What is primary structure of a p...

Q. What is primary structure of a protein? What is the significance of the primary structure? The primary protein structure is the linear sequence of amino acids that outline t

Explain biochemical tests bacterial testing, Explain Biochemical Tests Bact...

Explain Biochemical Tests Bacterial Testing? It deals with the various biochemical tests used to differentiate microorganisms. Identification of an unknown organism isolated fr

Adaptation, Adaptation Closely related to irritability is the capacit...

Adaptation Closely related to irritability is the capacity of living things for adaptation. You might have noticed that whenever you go outside in the bright sun after having

Explain the queens college step test, Explain the Queens College Step Test?...

Explain the Queens College Step Test? This test can be administered to large groups or those who are incapable of doing a test up till exhaustion. For this test, a bench (41 c

What is the main external morphological feature, What is the main external ...

What is the main external morphological feature that differentiates platyhelminthes from other worms (nematodes)? Platyhelminthes are also called as flatworms because they are

Nutrition, The oxidation of sugar in the cell of higher organisms takes pla...

The oxidation of sugar in the cell of higher organisms takes place in the ?

Light harvesting in green plants, Sunlight is absorbed by chlorophyll molec...

Sunlight is absorbed by chlorophyll molecules.  Chlorophyll is a porphyrin in that nitrogen atoms are coordinated to a magnesium ion instance for it is a magnesium porphyrin.  This

Haptotaxis - modes of cell movement, Haptotaxis - Modes of Cell Movement ...

Haptotaxis - Modes of Cell Movement Haptotaxis considers to the directed movement of cells in response to a concentration gradient of an adhesive molecule that might be presen

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