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प्रश्न
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.
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उत्तर
- Early embryos of fish, amphibians, reptiles, birds, and mammals have very similar structures.
- As they continue to expand, they develop new patterns.
- The earliest commonality of vertebrate embryos demonstrates that all vertebrate classes shared a common ancestor during evolution.
- This is known as embryological evidence for vertebrate evolution.
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संबंधित प्रश्न
What are vestigial organs?
(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.
(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
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
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
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
Attempt giving a clear definition of the term species.
Enlist any four sequential evolutionary names of human ancestors.
What are homologous organs?
Name two animals having homologous organs and two having analogous organs. Name these organs.
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
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
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.
Choose the correct option of the following question:
Wings of Insect and Birds are examples of :
Explain the importance of Anatomical evidences with examples.
Complete the flowchart.
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?
Homologous organs and vestigial organs are examples of ______ type of evidence in evolution.
Select the correct statement.
Why do all the gametes formed in human females have an X chromosome?
Evolution has exhibited a greater stability of molecular structure when compared with morphological structures. Comment on the statement and justify your opinion.
The process of mating of individuals, which are more closing related than the average of the population to which they belong is called ______.
The study of fossil evidence of evolution is called ______
Analogous organs arise due to ______.
How do we compute the age of a living tree?
How do we compute the age of a fossil?
How do we compute the age of a rock?
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 odd one out:
Write down the difference between homologous and analogous organs.
Industrial melanism was highlighted by ______.
Define Palaeontology.
