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

Skin, physiology of skin

physiology of skin

What are the inheritance and dominance patterns of rh blood, What are the i...

What are the inheritance and dominance patterns of the Rh blood system? An inheritance pattern of the Rh blood system is autosomal dominant that is the heterozygous manifests a

Bio212, do you think the social and cultural environment of the 18th and 19...

do you think the social and cultural environment of the 18th and 19th centuries helped or hindered the study of microbiology in particular and science in general

Photosynthesis and cellular respiration, what cell organelle does photosynt...

what cell organelle does photosynthesis take place in?

Greenfields hollow implant, In 1906, Greenfield described the fabrication a...

In 1906, Greenfield described the fabrication and insertion of an endossoeus implant. He for the first time, used a basket shaped, round, hollow implant made of an iridium-platinu

Define absorption, Define Absorption, Storage and Elimination of Riboflavin...

Define Absorption, Storage and Elimination of Riboflavin? Riboflavin is absorbed from the small intestine through the portal vein and is passed to all tissues via general circu

What is portal and rental circulation, What is Portal and Rental Circulatio...

What is Portal and Rental Circulation ? The body has other circulation systems that do not return blood directly to the heart. For instance, the blood that drains from the abdo

Why protein requirements of athletes get increased, Why Protein requirement...

Why Protein requirements of athletes get increased? Protein requirements of athletes, particularly those engaged in strength and power events, may be increased above those of s

Define characteristics of prebiotics, Define characteristics of prebiotics?...

Define characteristics of prebiotics? Characteristics of prebiotics Are non-digestible dietary/food ingredients Are not hydrolyzed/absorbed in the upper GIT, reach

Biosynthesis of cholesterol, Animals are able to synthesize cholesterol de ...

Animals are able to synthesize cholesterol de novo by an elegant series of reactions in that all 27 carbon atoms of cholesterol are derived from acetyl CoA. The  acetate  units  ar

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