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

What is the original concentration, A sample of yeast cells was serially di...

A sample of yeast cells was serially diluted 1/10 five times then serially diluted 1/3. the number of yeasts was338 yeasts per ml. what was the original concentration? Please show

Describe the methods of assessment, Describe the Methods of Assessment ...

Describe the Methods of Assessment The four general principles outlined above, that is, adaptation, brain and behaviour, context, and development serve as the foundation for th

Fundamental characters of embryonic development, FUNDAMENTAL CHARACTERS OF ...

FUNDAMENTAL CHARACTERS OF EMBRYONIC DEVELOPMENT 1 .       GAMETOGENESIS- Testes & ovaries are collectively called as gonads. Similarly sperms & ova are collectively calle

Genetics , write about complementary genes

write about complementary genes

Pressure gradient, Pressure Gradient You know that air pressure is the ...

Pressure Gradient You know that air pressure is the weight of the atmosphere over a unit area of the earth's surface. The average air pressure at sea level is approximately 1 k

Describe aerobic respiration in krebs cycle, Q. Until the Krebs cycle, aero...

Q. Until the Krebs cycle, aerobic respiration can be described without mentioning oxygen, the chemical element after which the reaction gets its name. Where in the process does thi

What is the genetic family tree, What is the genetic family tree? The G...

What is the genetic family tree? The Genetic family tree is a schematic family tree that shows the biological inheritance of some trait through successive generations. The G

Describe cohesion-adhesion theory , Cohesion-adhesion theory describes the...

Cohesion-adhesion theory describes the properties of water which help move it through the plant. Cohesion is the property of water molecules to stick together (held by hydrogen bo

Explain the properties of hydrolysed soy proteins, Explain the Properties o...

Explain the Properties of hydrolysed soy proteins Partially hydrolysed soy proteins possess good foam stabilization properties and can be used as whipping agents in combination

Define poverty and ignorance - cause of anaemia is dietary, Define Poverty ...

Define Poverty and ignorance - cause of anaemia is dietary? Low purchasing power of the communities and their consequent inability to meet the nutrient requirements, even after

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