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प्रश्न
Match the following.
| Column A | Column B |
| 1) Morphological evidences | a) Tail-bone or wisdom teeth |
| 2) Paleontological evidences | b) Leaf venation |
| c) Fossils |
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उत्तर
| Column A | Column B |
| 1) Morphological evidences | b) Leaf venation |
| 2) Paleontological evidences | c) Fossils |
संबंधित प्रश्न
State the connecting links between Peripatus with Annelida and Arthopoda.
Write the similarity between the wing of a butterfly and the wing of a bat. What do you infer from the above with reference to evolution?
Explain the terms analogous and homologous organs with examples.
What are homologous organs?
Differentiate between analogous and homologous structures.
The forelimbs of a frog, a bird and a man show the same basic design (or basic structure) of bones. What name is given to such organs?
Out of bacteria, spider, fish and chimpanzee, which organism has a better body design in evolutionary terms? Give reason for your answer.
Wing of an insect and forelimb of a bird are :
(a) analogous organs
(b) analeptic organs
(c) homologous
(d) homophobic organs
The wings of a housefly and the wings of a sparrow are an example of :
(a) analogous organs
(b) vestigial organs
(c) respiratory organs
(d) homologous organs
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?
The organs P and Q of two animals have different structures but similar functions. On the other hand, the two organs R and S of two other animals have the same basic structure but different functions.
(a) What are the organs like P and Q known as?
(b) Name the organs like P and Q. Also name the animals which have such organs.
(c) What are the organs like R and S called?
(d) Name the organs like R and S. Also name the animals which have such organs.
What do we call the degenerated or partially developed useless organs in living organisms? Enlist such organs in human body? How the same organs are useful in other animals?
Vestigial organ ______ present in human body is proof of evolution.
Write short notes based upon the information known to you.
Connecting link
With the help of diagrams, describe emasculation and bagging.
Draw a labelled diagram of T.S. of a leaf showing Kranz anatomy.
What are homologous structures?
Give scientific reason.
Peripatus is said to be the connecting link between Annelida and Arthropoda.
Explain any five types of evidence that support the theory of evolution.
The degenerated and non-functional organs found in an organism are called ______.
How do you differentiate homologous organs from analogous organs?
Select the CORRECT set of homologous organs.
The fossil remains of Archaeopteryx is a connecting link between ______
Evolution has exhibited a greater stability of molecular structure when compared with morphological structures. Comment on the statement and justify your opinion.
The study of fossil evidence of evolution is called ______
Animal husbandry and plant breeding programmes are the examples of ______.
Analogous organs arise due to ______.
Fossils are generally found in ______.
What were the characteristics of life forms that had been fossilised?
Did aquatic life forms get fossilised? If, yes where do we come across such fossils?
You have studied the story of Peppermoths in England. Had the industries been removed, what impact could it have had on the moth population? Discuss.
Complete the following chart:
As shown in figure below some organisms that share a common ancestor have features that have different functions, but similar structures.
These are known as ______. Give example.
Write avian characters of Archaeopteryx.
Define the term:
Homologous organs
Complete the following conceptual picture:
Give one example of homologous organs found in plants.
