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प्रश्न
Write short notes based upon the information known to you.
Embryology
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उत्तर
Embryology: Embryology is the study of the formation and development of embryo and foetus. Embryology is used as one of the evidences of evolution. Comparative study of embryos in vertebrates shows that there is lot of similarity in them at the initial stages whereas this similarity decreases gradually. This similarity in the development of embryos represents common origin of organisms.
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संबंधित प्रश्न
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
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
Explain with an example for the given, how the following provides evidence in favor of evolution in organisms :
Analogous organs
Out of bacteria, spider, fish and chimpanzee, which organism has a better body design in evolutionary terms? Give reason for your answer.
The presence of which of the following types of organs in two organisms indicates that they are derived from the same ancestor?
(a) analogous organs
(b) respiratory organs
(c) digestive 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
Select a set of homologous organs from the following:
(A) Wings of a bat and wings of a butterfly
(B) Wings of a pigeon and wings of a bat
(C) Wings of a butterfly and wings of a pigeon
(D) Forelimbs of a duck, forelimbs of a cow and forelimbs of a lizard
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.
Write the names of those animals in whom some vestigial organs in human body are functioning.
Observe the picture and answer the following questions.
A) Which evidence of evolution is shown in the picture?
B) What can be proven with this proof?
C) Give one more example of evidence of evolution
With the help of diagrams, describe emasculation and bagging.
What do you mean by vestigial structures? Name four vestigial organs found in man.
Explain any three molecular (genetic) evidences in favour of organic evolution.
Short answer question.
Give the significance of fossils.
Long answer question.
Would you consider wings of butterfly and bat as homologous or analogous and why?
Explain the importance of Anatomical evidences with examples.
Biogenetic law states that ______.
Select vestigial organs from the following.
Select the correct statement.
Which of these is not a vestigial organ in human beings?
Evolution has exhibited a greater stability of molecular structure when compared with morphological structures. Comment on the statement and justify your opinion.
Cucurbits do not develop thick and woody stem as they are:
Basic principles of embryonic development were pronounced by:
The process of mating of individuals, which are more closing related than the average of the population to which they belong is called ______.
Flippers of Penguins and Dolphins are examples of:
The study of fossil evidence of evolution is called ______
Appearance of antibiotic-resistant bacteria is an example of ______.
What were the characteristics of life forms that had been fossilised?
How do we compute the age of a living tree?
How do we compute the age of a fossil?
The evolutionary story of moths in England during industrialisation reveals, that 'evolution is apparently reversible'. Clarify this statement.
I am the connecting link of annelida and arthropoda. What is my name?
What is the function of the appendix of our digestive system?
Write down the difference between homologous and analogous organs.
Write a note on the significance of Palaeontology.
Define the term:
Homologous organs
Industrial melanism was highlighted by ______.
Write names of some vestigial organs in the human body.
