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

How do organisms adjust to changes in temperature, How do organisms adjust ...

How do organisms adjust to changes in temperature? Some of the most ordinary way for an organism to adjust to changes in body temperature is by perspiration or panting.

What is the explanation for the bleeding, Q. What is the explanation for th...

Q. What is the explanation for the bleeding that accompanies menses? The hemorrhage that accompanies menses occurs because the endometrium is a richly vascularized tissue and t

Proximal convoluted, Normal 0 false false false EN-IN ...

Normal 0 false false false EN-IN X-NONE X-NONE MicrosoftInternetExplorer4

Explain the buccal perforations, Buccal Perforations Buccal concavitie...

Buccal Perforations Buccal concavities in the bone can result in some threads of the implant being exposed. Where these are very circumscribed and covered with thick and well-

BNA and RNA, Compared to the original sequence what type of mutation occurr...

Compared to the original sequence what type of mutation occurred on the following DNA sequence? Original: TACGAATTCGATAC Mutant: TACASSTTCCATAC

Define biomaterial and an implant and state, Q. Define biomaterial and an i...

Q. Define biomaterial and an implant and state? a) Biologically compatibility: an ideal implant material will elicit mainly physiological reactions within the surrounding tissu

What are the segments that form the body of the tapeworm, What are the segm...

What are the segments that form the body of the tapeworm called? What is their function? The body of the tapeworm is made of segments known as proglottids. The proglottids are

What are some functions of the epithelium, What are some functions of the e...

What are some functions of the epithelium? The epithelial tissues can do covering, impermeability and protection against the environment, for instance, in the skin, resorption

Explain about the adipose tissue - energy balance, Explain about the Adipos...

Explain about the Adipose tissue - energy balance? At this point, it will not be irrelevant to consider how exactly an increase in the fat depot takes place. For understanding

# FUNGAL NUTRITION, Write on spoilage of food products by fungi,nutrition,c...

Write on spoilage of food products by fungi,nutrition,condition for growth,consequencies and prevention.

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