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

Explain hypertension in biochemical or physiological risk, Explain Hyperten...

Explain Hypertension in biochemical or physiological risk factors? The importance of elevated BP as a risk factor for CAD, heart failure, cerebrovascular disease and renal fail

collection of solid waste, There are three methods of collections: 1.  ...

There are three methods of collections: 1.      Kerbside collection: In this collection system the refuse is brought in containers and placed on the footway, from where it is

Explain about fish epidermis, How different is the fish epidermis from the ...

How different is the fish epidermis from the amphibian epidermis? The fish epidermis is very thin and having mucus-secreting cells. The fish skin does not present keratin. The

What are seed gums, What are seed gums? What are its characteristic propert...

What are seed gums? What are its characteristic properties? Seed gums are a group of polysaccharides with the following properties: light to dark cream colored amorphou

How different are taenia solium and taenia saginata, Q. Concerning their re...

Q. Concerning their respective intermediate hosts how different are Taenia solium and Taenia saginata? The midway hosts of the Taenia solium are pigs and the intermediate hosts

How does epistasis affect proportion of phenotypical form, In the hybridiza...

In the hybridization of 2 genes (4 different alleles, 2 of each pair) how does epistasis affect the proportion of phenotypical forms in the F2 generation? In the dihybridism wi

Types of fats, FATS ARE OF TWO TYPES (a) Hard Fats They are t...

FATS ARE OF TWO TYPES (a) Hard Fats They are true fats which are solid at room temperature of 20 o C. It is due to presence of long chain saturated fatty acid

What are the symptoms and signs of pericardial effusion, Q. What are the Sy...

Q. What are the Symptoms and Signs of pericardial effusion? Asymptomatic: Slowly accumulating small to moderate pericardial effusion may not cause significant elevation of intr

Explain about the dysphagia, Explain about the Dysphagia? Dysphagia is ...

Explain about the Dysphagia? Dysphagia is the inability to swallow or difficulty in swallowing. It is a common problem in those with neurological disorders and can occur in any

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