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

Define protein requirements during sepsis, Define Protein Requirements duri...

Define Protein Requirements during Sepsis? Adequate amount of protein is required by these patients to improve immunity against infections, promote recovery, spare lean body ma

Can the cooler have had any effect, Write down any other possible explanati...

Write down any other possible explanations you think of.could the cooler have had any effect? Could something in the water be reasonable? Could there be an object in the water that

Why is the cerebellum more developed in mammals, Why is the cerebellum more...

Why is the cerebellum more developed in mammals that jump or fly? The cerebellum is the major brain structure that coordinates the movement and the equilibrium of the body. For

Checkpoints and cell cycle control, Checkpoints and Cell Cycle Control ...

Checkpoints and Cell Cycle Control Cell cycle checkpoints are control mechanisms which ensure the fidelity of cell division within eukaryotic cells. These checkpoints confirm w

Prevention and control of water pollution, Various ways/techniques suggeste...

Various ways/techniques suggested for control of water pollution are as follows: 1. Pollutants (radio active, chemical, biological) present in water bodies can be removed by app

Thermodynamics, Thermodynamics Thermodynamics  tells us that every tran...

Thermodynamics Thermodynamics  tells us that every transformation of matter chemical  transformation is  accompanied with  energy conversion .For example  when complex  molecul

Describe animal which limits activity to period of dim light, Which term is...

Which term is used to describe an animal which limits its activity to periods of dim light at dawn and dusk? a) Diurnal (pron: die-ER-nal) b) Vesperal (pron: VESS-per-al)

Anther, Anther  is the top of a stamen's filament; divided into pollen sacs...

Anther  is the top of a stamen's filament; divided into pollen sacs in which the pollen grains are form.

Euglena, Take the prepared slide of Euglena and focus it first under low po...

Take the prepared slide of Euglena and focus it first under low power and next under the high power of tlie microscope. Observe tlie following characteristics: i) Euglena is an

What are cilia and flagella, Cilia and flagella are structures found in var...

Cilia and flagella are structures found in various prokaryotes as well in some eukaryotic cells. They play defense, nutrition and movement roles for the cell. In eukaryotic cells o

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