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

Pattern of limb development, Pattern of Limb Development The first vi...

Pattern of Limb Development The first visible sign of limb development is the appearance of ridge or thickening on each lateral side of the embryo of amniotes. The ridge call

Membrane potential, a solution of 5mMol/L CaCl2 is separated from a solutio...

a solution of 5mMol/L CaCl2 is separated from a solution of 1 micromole/L CaCl2 by a membrane that is selectively permeable to Ca+2 but is impermeable to Cl-1 what are the magnitu

Colour coding rules for biomedical waste management, Q. Discuss the colour ...

Q. Discuss the colour coding rules for biomedical waste management and handling? Colour coding biomedical waste( management and handling) rules, 1998

Define the drugs effects on excretion, Define the Drugs Effects on Excretio...

Define the Drugs Effects on Excretion? Use of certain drugs can influence the excretion of certain substances. For example, besides their intended increase in sodium excretion,

What are the body fat measurements, What are the Body Fat Measurements? ...

What are the Body Fat Measurements? Obesity is best classified in adults based on Body Mass Index (BMI) classification. BMI, you already know, is a measure of body jut based on

Develop a hypothesis relating to the amount, Develop a hypothesis relating ...

Develop a hypothesis relating to the amount of dissolved oxygen measured in the water sample and the number of fish observed in the body of water.

What is the aim of milling, What is the aim of milling The aim of milli...

What is the aim of milling The aim of milling (the process including crushing and grinding) is to obtain preferentially a flour, in which the constituents of the endosperm cell

Deficiency diseases-copper deficiency, Copper deficiency Copper deficie...

Copper deficiency Copper deficiency may be primary or secondary (conditional). Primary copper deficiency occurs due to its inadequate dietary intake; whereas secondary copper d

Determine how to calculate the amount of nitrogen, Determine How to Calcula...

Determine How to Calculate the Amount of Nitrogen? The amount of nitrogen can be calculated for this value using the equation: 1000 ml of 1N H 2 SO 4 = 1000 ml of 1N NH 3

Nutrition, The oxidation of sugar in the cell of higher organisms takes pla...

The oxidation of sugar in the cell of higher organisms takes place in the ?

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