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

Determine the purpose of glucometer, Glucometer mainly for the following pu...

Glucometer mainly for the following purpose. (i) In acute and chronic care facilities at the patient's bedside, in clinics or hospitals. (ii) In physician's clinics. (iii

Explain the four initial stages of the embryonic development, What are the ...

What are the four initial stages of the embryonic development? The four initial parts of the embryonic development are the morula stage, the blastula stage, the gastrula stage

Define b-complex vitamins required for elderly, Define B-Complex Vitamins r...

Define B-Complex Vitamins required for elderly? B-Complex Vitamins: Various B complex vitamins especially B folic acid, B 6 ,  and riboflavin are found to affect favourably t

Heart, Septa prevent oxygenated and deoxygenated blood. Give reason

Septa prevent oxygenated and deoxygenated blood. Give reason

Cross-pollination - types of pollination, Cross-Pollination - Types of Poll...

Cross-Pollination - Types of Pollination In this kind of pollination the pollen from anther of one individual is transferred to the stigma of another individual of the same sp

Explain differences between thrombus and embolus, Explain the differences b...

Explain the differences between a thrombus and an embolus. Include predisposing factors, mechanism of occurrence, treatment, and methods of detection with medical imaging, if any.

Explain nsp and food hydrocolloids, NSP NSP or dietary fibre is the nam...

NSP NSP or dietary fibre is the name given to a group of materials found in the cell walls of plants which gives the plant its structure and form. Food hydrocolloids Fo

External sources for health care, Normal 0 false false fals...

Normal 0 false false false EN-IN X-NONE X-NONE MicrosoftInternetExplorer4

Aeration, Aeration A well-aerated soil is one in which gases are availa...

Aeration A well-aerated soil is one in which gases are available to plant roots and other soil organisms, in sufficient quantities and in proper proportions to support their no

Causes of cancer, Causes of Cancer Scientists have identified the cellu...

Causes of Cancer Scientists have identified the cellular genes that code for those proteins which jointly control and regulate cell growth and division. These  genes are of two

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