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प्रश्न
Pick the odd man out:
विकल्प
duckbill platypus
pomfret
lungfish
peripatus
उत्तर
pomfret
Explanation:
In Peripatus, characters like segmented body, thin cuticle, and parapodia-like organs are present. Similarly, duck-billed platypus lays eggs like reptiles but shows relationships with mammals too due to the presence of mammary glands and hairs. Lungfish perform respiration with lungs, irrespective of being fish. These examples indicate that mammals are evolved from reptiles and amphibians from fish.
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संबंधित प्रश्न
What are vestigial organs?
Differentiate between homology and analogy. Give one example of each.
(a) Select the homologous structures from the combinations given below:
(i) Forelimbs of whales and bats
(ii) Tuber of potato and sweet potato
(iii) Eyes of octopus and mammals
(iv) Thorns 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?
State a reason for the increased population of dark coloured moths coinciding with the loss of lichens (on tree barks) during industrialization period in England.
An example of homologous organs is
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
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
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
Vestigial organ ______ present in human body is proof of evolution.
Write the names of those animals in whom the human body organs are functioning.
Complete the following chart:
Draw a labelled diagram of T.S. of a leaf showing Kranz anatomy.
Explain any three molecular (genetic) evidences in favour of organic evolution.
Find an odd one out.
The decaying process of C-14 occurs continuously in dead organisms only.
Match the following.
| Column A | Column B |
| 1) Morphological evidences | a) Tail-bone or wisdom teeth |
| 2) Paleontological evidences | b) Leaf venation |
| c) Fossils |
Write a short note:
Embryological evidences
Enlist the evidences of evolution.
What is carbon dating?
Biogenetic law states that ______.
Select the correct statement.
Select the CORRECT match.
Select the CORRECT set of homologous organs.
Homologous organs are:
Cucurbits do not develop thick and woody stem as they are:
Study of fossils is ______.
What are we referring to? When we say 'simple organisms' or 'complex organisms'.
You have studied the story of Pepper moths in England. Had the industries been removed, what impact could it have on the moth population? Discuss.
I am the connecting link of annelida and arthropoda. What is my name?
Write down the difference between homologous and analogous organs.
Find the odd one out:
Industrial melanism in England after 1850 is an excellent example of Natural selection. Explain how?
Give a definition of Palaeontology.
