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

Microscope, How to calculate the magnifying power of a microscope i

How to calculate the magnifying power of a microscope i

What is polysaccharides, Polysaccharides are vast chains of sugar units joi...

Polysaccharides are vast chains of sugar units joined together.  The chains should be branched or linear depending on the polysaccharide.  In  animals,  excess glucose is stored as

Volvocine Protozoa, Why is Volvocine Protozoa not considered an animal?

Why is Volvocine Protozoa not considered an animal?

Root - plant growth substances, Root - Plant Growth Substances Inducti...

Root - Plant Growth Substances Induction of roots by auxins in stem cuttings is a well known phenomenon. The concentrations needed are much lower as compared to that which pro

Cause the inhibition of apoptosis, We now understand that mutations that ca...

We now understand that mutations that cause the inhibition of apoptosis are found in tumors. Because proliferation itself is not induced by the inhibition of apoptosis, explain how

Define complete and simple circulation, Q. Why is the fish circulation clas...

Q. Why is the fish circulation classified as a complete and simple circulation? Simple circulation is that in which the blood circulates only in one circuit as opposed to the d

External ear, EXTERNA L EAR - It is an oval shaped, some what funne...

EXTERNA L EAR - It is an oval shaped, some what funnel like, skin covered flap of elastic cartilage and muscles. It's outer stiff ridge is called hellix. Lower flexibl

Ecological pyramids - ecosystem, Ecological Pyramids - Ecosystem The a...

Ecological Pyramids - Ecosystem The ancient Egyptians constructed elaborate tombs called pyramids. The base of the pyramid is broad and it supports the upper levels of the str

What do you mean by punch cards, Q. What do you mean by Punch cards? Pu...

Q. What do you mean by Punch cards? Punch cards are used when the number of taxa to be keyed out is large. In this type of cards the holes at numbers corresponding to a charact

What is the proper name for edta and what is it, What is the proper name fo...

What is the proper name for EDTA and what is it? EDTA is ethylenediamine tetraacetic acid. It is a tough chelating agent. It has many uses containing: 1) Industrial cleaning

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