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प्रश्न
Write short notes based upon the information known to you.
Connecting link
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उत्तर
Connecting link: Connecting link refers to plant and organisms which show characteristics related to two different groups. For example, Peripatus is considered a connecting link between annelida and arthropoda. It has characteristics like segmented body, thin cuticle and parapodia-like organs which are similar to annelids. It also shows tracheal respiration and open circulatory system which is similar to arthropods. Another example is duck billed platypus which is a connecting link between reptiles and mammals as it lays eggs like reptiles and has mammary glands like mammals.
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संबंधित प्रश्न
Mammals : _________ : : Amphibia : Fishes
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
An example of homologous organs is
Explain with an example for the given, how the following provides evidence in favor of evolution in organisms :
Fossils
The organs which perform different functions but have the same basic structure are known as :
(a) homologous organs
(b) analogous organs
(c) homolytic organs
(d) analytic 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
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
Write short notes based upon the information known to you.
Embryology
Write the names of those animals in whom some vestigial organs in human body are functioning.
Answer the following question.
Wisdom teeth : Vestigial organs :: Lungfish : ....................
“Appearance of melanised moths post-industrialisation in England is a classic example of evolution by natural selection.” Explain.
With the help of diagrams, describe emasculation and bagging.
The most common types of fossils are ------------------------.
Explain the importance of Anatomical evidences with examples.
Find an odd one out.
Find an odd one out.
Give scientific reason.
Duck-billed platypus shows relationship with mammals.
Write a short note:
Embryological evidences
Define the evidence of evolution shown in the figure.
Observe the given images and answer the following questions.
- Which evolutionary evidence does it indicate?
- What does it prove?
- State another example of evolutionary evidence.
Which evidence of evolution is shown in the given picture? Explain the importance of this evidence.
How do you differentiate homologous organs from analogous organs?
Homologous organs and vestigial organs are examples of ______ type of evidence in evolution.
Select the CORRECT match.
Which of these is not a vestigial organ in human beings?
Define vestigial organs.
Evolution has exhibited a greater stability of molecular structure when compared with morphological structures. Comment on the statement and justify your opinion.
Which is not a vestigial organ in a man?
Flippers of Penguins and Dolphins are examples of:
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?
As shown in figure below some organisms that share a common ancestor have features that have different functions, but similar structures.
These are known as ______. Give example.
Explain natural selection with the example of industrial melanism.
