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प्रश्न
Give scientific reason.
Peripatus is said to be the connecting link between Annelida and Arthropoda.
उत्तर
- Peripatus is the connecting link between two different groups - Annelida and Arthropoda.
- It shows annelid-like characters such as segmented body, thin cuticle, and parapodia-like organs.
- It also shows arthropod-like characters such as tracheal respiration and open circulatory system.
Therefore, Peripatus is said to be the connecting link between Annelida and Arthropoda.
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संबंधित प्रश्न
State the connecting links between Peripatus with Annelida and Arthopoda.
Give two examples of vestigial organs in human beings and plants.
Differentiate between analogy and homology giving one example each of plant and animal respectively.
Which one of the following pairs of vegetables is an example of homologous structures?
(A) Potato and sweet potato
(B) Carrot and radish
(C) Carrot and tomato
(D) Tomato and radish
Explain the terms analogous and homologous organs with examples.
Explain with an example for the given, how the following provides evidence in favor of evolution in organisms :
Fossils
Out of bacteria, spider, fish and chimpanzee, which organism has a better body design in evolutionary terms? Give reason for your answer.
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?
In a class, students were asked to observe the models/slides/pictures of the skeletons of forelimbs and wings of different organisms. After the observations the students made the following groups of homologous structures. Select the correct group :
(A) Wings of a bird and a butterfly
(B) Wings of a pigeon and a bat
(C) Wings of a butterfly and a bat
(D) Forelimbs of a cow, a duck and a lizard
Write short notes based upon the information known to you.
Embryology
Write the names of those animals in whom the human body organs are functioning.
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A) Which evidence of evolution is shown in the picture?
B) What can be proven with this proof?
C) Give one more example of evidence of evolution
Complete the following chart:
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The most common types of fossils are ------------------------.
What do you mean by vestigial structures? Name four vestigial organs found in man.
Answer the following question:
What are homologous structures? Give an example. Is it necessary that homologous structures always have a common ancestor? Justify your answer.
Short answer question.
Give the significance of fossils.
Explain the importance of Anatomical evidences with examples.
Write a short note:
Embryological evidences
Define the evidence of evolution shown in the figure.
What is carbon dating?
Which evidence of evolution is shown in the given picture? Explain the importance of this evidence.
How do you differentiate homologous organs from analogous organs?
Evolutionary convergence is the development of:
Which is not a vestigial organ in a man?
Flippers of Penguins and Dolphins are examples of:
The bones of forelimbs of whale, bat, cheetah and man are similar in structure, because ______.
Analogous organs arise due to ______.
Complete the following chart:
Give a scientific reason.
Morphological evidences suggest that dog, sheep and wolf have a common origin.
What is the function of the appendix of our digestive system?
Find the odd one out:
Industrial melanism was highlighted by ______.
Give examples of homologous organs and analogous organs in plants.
Write names of some vestigial organs in the human body.
