Advertisements
Advertisements
प्रश्न
Very short answer question:
What is vestigeal organ?
उत्तर
Vestigeal organs, or rudimentary organs, are imperfectly developed and non-functional, degenerate structures that were functional in some related and other animals or in ancestors.
संबंधित प्रश्न
Mammals : _________ : : Amphibia : Fishes
State the connecting links between Peripatus with Annelida and Arthopoda.
What are vestigial organs?
Name any two temporary embryonic structures in vertebrates which provide evidence for evolution.
Some dinosaurs had feathers although they could not fly birds have feathers that help them to fly. In the context of evolution, this means that ______
X, Y, and Z are three animals. The animal X can fly but animal Y can only run on ground or walls. The forelimbs of animals X and Y have the same basic design but they are used for different purposes such as flying and running respectively. The animal Z became extinct an long time ago. The study of fossils of Z tells us that it had some features like those of X and some like those of Y. In fact, Z is said to form a connecting link in the evolutionary chain of X and Y.
(a) What could the animals X, Y and Z be?
(b) What name is given to the forelimbs like those of X and Y which have the same basic design but different functions?
(c) Name one feature in which Z resembled X.
(d) Name one feature in which Z resembled Y.
(e) Which is the correct evolutionary chain involving X, Y and Z : X → Z → Y or Y → Z → X?
Find an odd one out.
Write a short note:
Embryological evidences
Fossils are generally found in ______.
What were the characteristics of life forms that had been fossilised?
