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प्रश्न
I am a connecting link between reptiles and mammals. Who am I?
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उत्तर
Duck-billed platypus
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संबंधित प्रश्न
State the connecting links between Peripatus with Annelida and Arthopoda.
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
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
Select two pairs from the following which exhibit divergent evolution. Give reasons for your answer.
(i) Forelimbs of cheetah and mammals
(ii) Flippers of dolphins and penguins
(iii) Wings of butterflies and birds
(iv) Forelimbs of whales and mammals
Differentiate between analogy and homology giving one example each of plant and animal respectively.
How analogy and homology considered as an evidence in support of evolution ?
Explain with an example for the given, how the following provides evidence in favor of evolution in organisms :
Fossils
Name any two temporary embryonic structures in vertebrates which provide evidence for evolution.
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?
Wing of an insect and forelimb of a bird are :
(a) analogous organs
(b) analeptic organs
(c) homologous
(d) homophobic organs
Some dinosaurs had feathers although they could not fly birds have feathers that help them to fly. In the context of evolution, this means that ______
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
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
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?
Read the following statement and justify same in your own words with the help of suitable example.
There is evidences of fatal science among chordates.
Vestigial organ ______ present in human body is proof of evolution.
Write the names of those animals in whom some vestigial organs in human body are functioning.
_______ is a connecting link between Annelida and Arthropoda.
Define fossil.
Define phylogeny.
Long answer question.
Would you consider wings of butterfly and bat as homologous or analogous and why?
Appendix : vestigial organ : : Peripatus : ____________
What is carbon dating?
Observe the following images and answer the questions.
- Which evolutionary evidences are indicated in the given picture?
- How are they formed?
- Which method is used to measure their age or their time?
Select the correct statement.
Cucurbits do not develop thick and woody stem as they are:
Which is not a vestigial organ in a man?
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.
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.
Give a scientific reason.
Morphological evidences suggest that dog, sheep and wolf have a common origin.
Evolutionary convergence is the development of a ______.
Write avian characters of Archaeopteryx.
Industrial melanism was highlighted by ______.
Pick the odd man out:
