Home » Ask & Discuss » Biology (for Medical Entrance) » Zoology « Back to Discussion

Zoology

Blazing goIITian

Joined:	10 Oct 2008
Post:	634

30 Jan 2009 18:39:36 IST

0 People liked this

777

URGENT:wing of bird and wing of bat are homologus or analogus ?clearly state reasons..

None

URGENT:wing of bird and wing of bat are homologus or analogus ?clearly state reasons..

Share this article on:

Comments (5)

goiitian

Blazing goIITian

Joined: 28 Apr 2008

Posts: 781

30 Jan 2009 20:09:42 IST

Like 0 people liked this

bats and humans share a common ancestor...sooooo...its homologus(chromosomes that carry the same genes)

Yash: Save Tigers..!!

Blazing goIITian

Joined: 6 May 2008

Posts: 924

30 Jan 2009 20:15:31 IST

Like 1 people liked this

n an evolutionary framework, similarity in structure results either from common ancestry or from convergent evolution. All bats share a common wing shape because they share a common ancestor; that similarity is a homology. The bones in the bat wing have the same arrangement as the bones in your hand, and the bones at the top of the wing are very much like your arm bones. These similarities are homologies, because bats and humans share a common ancestor.

Birds have the same arm bones as humans and bats, but the bones are arranged in their wings very differently than the bones in bat wings. Bats fly using skin stretched across their finger bones, while birds fused those bones together and use feathers to generate lift. So even though bat wings and bird wings are similar in some ways, we can be sure that the wing shape is not homologous

http://ncseweb.org/evolution/science/what-is-homology

JPS

Blazing goIITian

Joined: 21 Nov 2008

Posts: 1020

30 Jan 2009 20:24:00 IST

Like 2 people liked this

Bat wings and bird wings are analogous as flight structures. the flight surface in bats consists of a membrane stretched between the extended digits, whereas the digits of the bird are relatively small and do not support the flight surface. as by definition analogous organs are those which have similar fuctions but have different structural details. RATE IF USEFUL

Himadri Verma

Cool goIITian

Joined: 7 Sep 2008

Posts: 33

7 Feb 2009 16:48:37 IST

Like 1 people liked this

They are homologous organs as they have a common origin,nerve supply and blood supply but their function is different...wings of birds are used in flying wheras those of bats are used for them to hang over trees.

KRRISH

Blazing goIITian

Joined: 10 Nov 2008

Posts: 365

7 Feb 2009 18:53:44 IST

Like 1 people liked this

Bat wings and bird wings are analogous as flight structures: their structure and function have evolved by different routes from a flightless reptilian ancestor. Note for example that a good portion of the flight surface in bats consists of a membrane stretched between the extended digits (chiropatagium), whereas the digits of the bird are relatively small and do not support the flight surface. Note also that bat and birds wings are homologous as forelimbs

Quick Reply

Reply

	Some HTML allowed.
	Keep your comments above the belt or risk having them deleted.
	Signup for a avatar to have your pictures show up by your comment
	If Members see a thread that violates the Posting Rules, bring it to the attention of the Moderator Team