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 enzymatic chemical reactions, How does facilitated diffusion ...

How does facilitated diffusion present similarities with enzymatic chemical reactions? One of the main examples of facilitated transport is the entrance of glucose from the blo

Explain full liquid diet, Explain Full Liquid Diet Full Liquid Diet:  ...

Explain Full Liquid Diet Full Liquid Diet:   This diet provides foods and fluids that are liquid or semi liquid at room temperature. The type of food provided may vary dependi

Cells, what happens in meiosis in prophase 1?

what happens in meiosis in prophase 1?

Nitrification - nutrient cycles, Nitrification - Nutrient Cycles Ammon...

Nitrification - Nutrient Cycles Ammonia or ammonium salts, are converted into nitrate in a process termed nitrification to be useful to most autotrophic and heterotrophic orga

Pulmonary valvotomy with infundibular resection, Pulmonary Valvotomy with I...

Pulmonary Valvotomy with Infundibular Resection :  Infundibular obstruction in cases of pulmonary valvar stenosis could be primary or secondary. 11' this obstruction is signi

How nondisjunction in meiosis i and meiosis ii look in males, How does nond...

How does nondisjunction in meiosis I and meiosis II look in males and females? Diagram it.

Growth-form and structure, Growth-form and Structure In a community the...

Growth-form and Structure In a community the number of species and size of their populations vary greatly. A community may have one or several species. The environmental factor

Crustacea, Crustacea The Crustacea show a great morphological diversit...

Crustacea The Crustacea show a great morphological diversity of appendages which may be grouped into three categories, cephalic, thoracic and abdominal. Their appendages are c

Yersinia enterocolitica, Yersinia enterocolitica The genus Yersinia con...

Yersinia enterocolitica The genus Yersinia contains of 3 human pathogenic species, Y. enterocolitica, Y. pseudotuberculosis and Y. pestis, among which, Y. enterocolitica finds

Theory of natural selection, What key idea, contained in Malthus's essay on...

What key idea, contained in Malthus's essay on populations, helped Darwin formulate his theory of natural selection?

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