Advertisements
Advertisements
प्रश्न
Find an odd one out.
विकल्प
Leaf venation
Size of seeds
Leaf petiole
Leaf shape
Advertisements
उत्तर
Size of seeds
APPEARS IN
संबंधित प्रश्न
(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
Explain with an example for the given, how the following provides evidence in favor of evolution in organisms :
Homologous organs
Study the following statements:-
I. Wings of birds and wings of bats are homologous organs.
II. Wings of birds and wings of insects are modified forelimbs.
III. Wings of birds and wings of insects are analogous organs.
IV. Wings of birds and forelimbs of horse are homologous organs.
The correct statements are
(A) I and II
(B) II and III
(C) III and IV
(D) I and IV
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?
If you are asked to select a group of two vegetables, out of the following, having homologous structures which one would you select?
(a) Carrot and radish
(b) Potato and sweet potato
(c) Potato and tomato
(d) Lady finger and potato
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
How do homologous organs help in providing evidence for organic evolution?
Human tailbone is a vestigial organ. Explain.
Differentiate between analogous and homologous structures.
Select and write analogous structures from the list given below :
1) Wings of butterfly and birds
2) Vertebrate hearts
3) Tendrils of Bougainvillea and Cucurbita
4) Tubers of sweet potato and potato
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.
You have potato, carrot, radish, sweet potato, tomato and ginger bought from the market in your jute bag. Identify two vegetables to represent the correct homologous structures.
(A) Potato and tomato
(B) Carrot and tomato
(C) Potato and sweet potato
(D) Carrot and radish
Observe the picture and answer the following questions.
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
“Appearance of melanised moths post-industrialisation in England is a classic example of evolution by natural selection.” Explain.
Short answer question.
Give the significance of fossils.
I am a connecting link between reptiles and mammals. Who am I?
Give scientific reason.
Vertebrates have slowly originated from invertebrates.
Complete the flowchart.
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?
Why do all the gametes formed in human females have an X chromosome?
Homologous organs are:
Cucurbits do not develop thick and woody stem as they are:
The presence of gill slits, in the embryos of all vertebrates, supports the theory of ______.
Which is not a vestigial organ in a man?
The study of fossil evidence of evolution is called ______
Which of the following is used as an atmospheric pollution indicator?
Animal husbandry and plant breeding programmes are the examples of ______.
How do we compute the age of a fossil?
While creation and presence of variation is directionless, natural selection is directional as it is in the context of adaptation. Comment.
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.
Evolutionary convergence is the development of a ______.
Industrial melanism in England after 1850 is an excellent example of Natural selection. Explain how?
Complete the following conceptual picture:
