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

Conductometry, conductometry and its uses in biology

conductometry and its uses in biology

Cardiomyocytes and motor neurons, Describe the mechanisms and genetic regul...

Describe the mechanisms and genetic regulations that underpin how two cells such as cardiomyocyte and a motor neuron have identical gnomes, yet are functionally and structurally di

Transgenic animals, T ra n sge n i c animals There are various d...

T ra n sge n i c animals There are various definitions for the term transgenic animal . The transgenic animal is an animal in which there has been a deliberate modifica

Name the skin receptors in humans, Which of the below are skin receptors...

Which of the below are skin receptors in humans which are sensitive to heat? Are they: a) End organs of Krause b) Meissner's corpuscles c) End organs of Ruffini d)

Induction of disease resistance in plants by heat-shock, Induction of disea...

Induction of disease resistance in plants by heat-shock The fungus Cladosporium cucumerinum infects cucumber and causes disease in the plant. However, if seedling of cucumber

Supportive therapy for diabetes patient, Q. Supportive Therapy for diabetes...

Q. Supportive Therapy for diabetes patient? Certain foods, part of food or food components have been found to be beneficial in managing hyperglycemia. Most of these have been i

If the protein binds to any other proteins, You are studying a gene, and it...

You are studying a gene, and its effects on skin cells. You want to find out A) If the protein made encoded by this gene binds to DNA in a particular place B) if the protein binds

Short coming of cell theory, SHORT COMING OF CELL THEORY / EXCEPTIONS OF CE...

SHORT COMING OF CELL THEORY / EXCEPTIONS OF CELL THEORY (i)       Viruses can be considered as exception to cell theory. They are made of proteins and ones of nucleic acid i.e.

Homologous and heterologous portions human sex chromosomes, What are the ho...

What are the homologous and the heterologous portions of the human sex chromosomes? The Homologous portion is that in which there are genes having alleles in both X and Y sex c

How alkaline cleaning compounds works, Q. How Alkaline cleaning compounds w...

Q. How Alkaline cleaning compounds works? Carbonates, bicarbonates, hydroxides of various metals are called alkaline compounds. Alkaline cleaning compounds have a pH between

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