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

Destruction of microorganisms, Q. Destruction of microorganisms? Ans. ...

Q. Destruction of microorganisms? Ans. Destruction or control of growth of microorganisms is the basis of food preservation. To 'preserve' actually means fro keep safe, r

Goal of dietary management for gdm, Q. Goal of dietary management for GDM? ...

Q. Goal of dietary management for GDM? The goal of dietary management for GDM is to provide the pregnant woman with adequate energy, commonly known as "calories", and to ensure

What treatment should be used for cardiac tamponade, Q. What Treatment shou...

Q. What Treatment should be used for cardiac tamponade? Percutaneous Pericardiocentesis Cardiac tamponade is an acute emergency and percutaneous pericardiocentesis must b

Intravenous route, Intravenous Route This route of administering drug...

Intravenous Route This route of administering drugs is becoming more popular in the paediatric practice. Purpose of this Route When rapid action is required.

Explain hepaticae, Hepaticae (Liverworts) The gametophyte is thalloid b...

Hepaticae (Liverworts) The gametophyte is thalloid body or simple stem and leaves, with aquatic or semi-terrestrial habit. Rhizoids are multiceillular. Some examples : Mar

What is the expression of moisture content, What is the Expression of Moist...

What is the Expression of Moisture Content? Moisture content, you would realize, is expressed in one of two ways i.e dry weight basis (dwb) or wet weight bases (wwb). Moisture

Explain genetic information that is transmitted hereditarily, Which is the ...

Which is the biological molecule that contains the genetic information that is transmitted hereditarily and controls the cellular functioning? The hereditary molecule that cont

Name the phases into which hiv infection is often divided, What are the thr...

What are the three phases into which the HIV infection is often divided? The HIV infection is often separated into three phases: the acute phase, from the infection to 1 until

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