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प्रश्न
Write a short note based on the information known to you.
Connecting link
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उत्तर
- A connecting link is an organism that shows characteristics of two different groups of organisms. For example, Peripatus is considered a connecting link between annelids and arthropods.
- It has features such as a segmented body, a thin cuticle, and parapodia-like appendages, similar to those of annelids.
- It also possesses tracheal respiration and an open circulatory system, as in arthropods.
- Another example is the Duck-billed Platypus, which acts as a connecting link between reptiles and mammals because it lays eggs like reptiles and has mammary glands like mammals.
APPEARS IN
संबंधित प्रश्न
How analogy and homology considered as an evidence in support of evolution ?
Four students P, Q, R and S differently reported the following set of organs to be analogous :
P. Forelimb of a frog and forelimb of a lizard
Q. Forelimb of a bird and forelimb of a human
R. Wings of a parrot and wings of a butterfly
S. Wings of a bird and wings of a bat
The two students who have reported correctly are :
(A) P and Q
(B) Q and R
(C) R and S
(D) P and S
Explain with an example for the given, how the following provides evidence in favor of evolution in organisms :
Analogous organs
What are homologous organs?
One pair of organs in the following animals are not homologous. This is :
(a) forelimbs in humans and lizard
(b) forelimbs in lizard and frog
(c) wings in butterfly and bat
(d) wings in bat and bird
Explain with suitable examples importance of anatomical evidence in evolution.
Choose the correct option of the following question:
Wings of Insect and Birds are examples of :
Differentiate between connecting links and the missing links.
Very short answer question:
What is vestigeal organ?
The decaying process of C-14 occurs continuously in dead organisms only.
Select the CORRECT match.
Select the CORRECT set of homologous organs.
Where is carbon dating used?
Define vestigial organs.
The study of fossil evidence of evolution is called ______
Organs having similar functions but different origin and development are known as:
Fossils are generally found in ______.
Give an example for convergent evolution and identify the features towards which they are converging.
How do we compute the age of a fossil?
The evolutionary story of moths in England during industrialisation reveals, that 'evolution is apparently reversible'. Clarify this statement.
