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प्रश्न
Complete the flowchart.
उत्तर
संबंधित प्रश्न
(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.
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.
Explain the terms analogous and homologous organs with examples.
Attempt giving a clear definition of the term species.
Explain the evolution of giraffe's neck according to Lamarck's theory of evolution.
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?
Out of bacteria, spider, fish and chimpanzee, which organism has a better body design in evolutionary terms? Give reason for your answer.
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
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
You have potato, carrot, radish, sweet potato, tomato and ginger bought from the market in your jute bag. Identify two vegetables to represent the correct homologous structures.
(A) Potato and tomato
(B) Carrot and tomato
(C) Potato and sweet potato
(D) Carrot and radish
Write the names of those animals in whom the human body organs are functioning.
Explain with suitable examples importance of anatomical evidence in evolution.
The most common types of fossils are ------------------------.
Draw a labelled diagram of T.S. of a leaf showing Kranz anatomy.
Choose the correct option of the following question:
Wings of Insect and Birds are examples of :
Name the parts shown in the diagram.
Human jaw
Which evidence of evolution is shown in the given picture? Explain the importance of this evidence.
Biogenetic law states that ______.
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.
Homologous organs are:
Basic principles of embryonic development were pronounced by:
The presence of gill slits, in the embryos of all vertebrates, supports the theory of ______.
The study of fossil evidence of evolution is called ______
Fossils are generally found in ______.
How do we compute the age of a rock?
You have studied the story of Pepper moths in England. Had the industries been removed, what impact could it have on the moth population? Discuss.
Complete the following chart:
I am the connecting link of annelida and arthropoda. What is my name?
Give a scientific reason.
Morphological evidences suggest that dog, sheep and wolf have a common origin.
Write avian characters of Archaeopteryx.
Write a note on the significance of Palaeontology.
Define the term:
Homologous organs
Industrial melanism in England after 1850 is an excellent example of Natural selection. Explain how?
