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प्रश्न
Give scientific reason.
Duck-billed platypus shows relationship with mammals.
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उत्तर
- The duck-billed platypus is a connecting link between mammals and reptiles.
- It shows similarity with mammals due to the presence of mammary glands and hairs.
Therefore, Duck-billed platypus shows relationship with mammals.
संबंधित प्रश्न
Give two examples of vestigial organs in human beings and plants.
(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.
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
Give the importance of fossil in support of organic evolution
Differentiate between analogous and homologous structures.
The organs which perform similar functions but have different basic structure are called :
(a) asymmetric organs
(b) analogous organs
(c) homologous organs
(d) homophonic organs
Wing of an insect and forelimb of a bird are :
(a) analogous organs
(b) analeptic organs
(c) homologous
(d) homophobic 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
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?
With the help of diagrams, describe emasculation and bagging.
The most common types of fossils are ------------------------.
Define fossil.
Differentiate between connecting links and the missing links.
What are homologous structures?
Long answer question.
Would you consider wings of butterfly and bat as homologous or analogous and why?
______ is a vestigial organ in human beings.
I am a connecting link between reptiles and mammals. Who am I?
The decaying process of C-14 occurs continuously in dead organisms only.
Write a short note:
Embryological evidences
Which evidence of evolution is shown in the given picture? Explain the importance of this evidence.
A human hand, a front leg of a cat, a front flipper of a whale and a bat’s wing look dissimilar and adapted for different functions. What is the name given to these organs?
Homologous organs and vestigial organs are examples of ______ type of evidence in evolution.
Define vestigial organs.
The presence of gill slits, in the embryos of all vertebrates, supports the theory of ______.
Which is not a vestigial organ in a man?
Which of the following is used as an atmospheric pollution indicator?
Animal husbandry and plant breeding programmes are the examples of ______.
What were the characteristics of life forms that had been fossilised?
How do we compute the age of a living tree?
The evolutionary story of moths in England during industrialisation reveals, that 'evolution is apparently reversible'. Clarify this statement.
Explain divergent evolution in detail. What is the driving force behind it?
I am the connecting link of annelida and arthropoda. What is my name?
Find the odd one out:
Industrial melanism was highlighted by ______.
Give one example of homologous organs found in plants.
Pick the odd man out:
