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प्रश्न
Write names of some vestigial organs in the human body.
उत्तर
The human body contains several vestigial organs, including the tailbone (coccyx), wisdom teeth, and body hairs.
संबंधित प्रश्न
Differentiate between analogy and homology giving one example each of plant and animal respectively.
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.
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
Which one of the following pairs of vegetables is an example of homologous structures?
(A) Potato and sweet potato
(B) Carrot and radish
(C) Carrot and tomato
(D) Tomato and radish
Can the wing of a butterfly and the wing of a bat be considered homologous organs? Why or why not?
Attempt giving a clear definition of the term species.
Differentiate between analogous and homologous structures.
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
The wings of a housefly and the wings of a sparrow are an example of :
(a) analogous organs
(b) vestigial organs
(c) respiratory 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
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?
Write short notes based upon the information known to you.
Embryology
Write short notes based upon the information known to you.
Connecting link
“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 ------------------------.
What do you mean by vestigial structures? Name four vestigial organs found in man.
Short answer question.
Give the significance of fossils.
Name the parts shown in the diagram.
Human jaw
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.
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?
How do you differentiate homologous organs from analogous organs?
Select the correct statement.
Where is carbon dating used?
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.
Basic principles of embryonic development were pronounced by:
The presence of gill slits, in the embryos of all vertebrates, supports the theory of ______.
Organs having similar functions but different origin and development are known as:
The bones of forelimbs of whale, bat, cheetah and man are similar in structure, because ______.
Appearance of antibiotic-resistant bacteria is an example of ______.
The evolutionary story of moths in England during industrialisation reveals, that 'evolution is apparently reversible'. Clarify this statement.
What is the function of the appendix of our digestive system?
Explain natural selection with the example of industrial melanism.
Evolutionary convergence is the development of a ______.
Industrial melanism in England after 1850 is an excellent example of Natural selection. Explain how?
