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प्रश्न
Give scientific reason.
Peripatus is said to be the connecting link between Annelida and Arthropoda.
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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
What are vestigial organs?
(a) Select the analogous structures from the combination given below:
(i) Forelimbs of whales and bats
(ii) Eyes of octopus and mammals
(iii) Tuber of sweet potato and potato
(iv) Tuber of Bougainvillea and tendrils of Cucurbita
(b) State the kind of evolution they represent
Given below is the list of vegetables available in the market. Select from these the two vegetables having homologous structures:
Potato, sweet potato, ginger, radish, tomato, carrot, okra (Lady’s finger)
(A) Potato and sweet potato
(B) Radish and carrot
(C) Okra and sweet potato
(D) Potato and tomato
Which of the following pairs of two vegetables represent the correct homologous structures?
(A) Sweet potato and potato
(B) Sweet potato and tomato
(C) Carrot and potato
(D) Radish and carrot
How analogy and homology considered as an evidence in support of evolution ?
Which of the following is a correct set of homologous organs?
(a) Forelimbs of frog, bird and lizard
(b) Spine of cactus and thorn of bougainvillea
(c) Wings of bat and wings of butterfly
(d) Wings of a bird and wings of a bat
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
Give the importance of fossil in support of organic evolution
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?
The presence of which of the following types of organs in two animals indicates that they are not derived from a common ancestor?
(a) homologous organs
(b) excretory organs
(c) analogous organs
(d) reproductive organs
There are five animals A, B, C, D and E. The animal A uses its modified forelimbs for flying. The animal B uses its forelimbs for running whereas the animal C uses its forelimbs for grasping. The animal D can live on land as well as in water and uses its forelimbs to prop up the front end of its body when at rest. The animal E which respires by using spiracles and tracheae uses wings for flying but its wings are analogous to the modified forelimbs of animal A.
(a) What could the animals A, B, C, D and E be?
(b) Why are the forelimbs of animals A, B, C, D called homologous organs?
(c) What does the existence of homologous organs in animals A, B, C and D tell us about their ancestors ?
(d) Why are the modified forelimbs of animal A and the wings of animal E called analogous organs?
(e) State whether animals A and E have a common ancestor or not.
Identify the following pairs as homologous and analogous organs:
(i) Sweet potato and potato
(ii) Eye of octopus and eye of mammals
(iii) Thorns of Bougainvillaea and tendrils of Cucurbits
(iv) Fore limbs of bat and whale
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
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There is evidences of fatal science among chordates.
Write short notes based upon the information known to you.
Embryology
Write short notes based upon the information known to you.
Connecting link
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Complete the following chart:
The most common types of fossils are ------------------------.
Explain any three molecular (genetic) evidences in favour of organic evolution.
Differentiate between connecting links and the missing links.
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Short answer question.
Give the significance of fossils.
I am a connecting link between reptiles and mammals. Who am I?
Which evidence of evolution is shown in the given picture? Explain the importance of this evidence.
Select the CORRECT match.
Which of these is not a vestigial organ in human beings?
Homologous organs are:
Flippers of Penguins and Dolphins are examples of:
Which of the following is used as an atmospheric pollution indicator?
Analogous organs arise due to ______.
Appearance of antibiotic-resistant bacteria is an example of ______.
What were the characteristics of life forms that had been fossilised?
What are we referring to? When we say 'simple organisms' or 'complex organisms'.
Give an example for convergent evolution and identify the features towards which they are converging.
Complete the following chart:
I am the connecting link of annelida and arthropoda. What is my name?
Write a note on the significance of Palaeontology.
Give one example of homologous organs found in plants.
