Advertisements
Advertisements
प्रश्न
Explain the following:- Natural Selection
उत्तर
Natural Selection:- Natural selection is the process of evolution of a species whereby characteristics which help individual organisms to survive and reproduce are passed on to their offspring, and those characteristics which do not help are not passed on.
Charles Darwin proposed the theory of natural selection. According to him, nature selects the fittest.
There are always changes in the progeny when an animal reproduces by sexual reproduction. Example: If one of the progeny of deer is tall and the other is short, then the tall one with long legs will survive. Because the progeny with short height cannot reach the leaves of tall trees and cannot get food, they will starve and hence die. Thus, it proves the theory of natural selection.
APPEARS IN
संबंधित प्रश्न
Explain the concept ‘survival of the fittest’.
Give the respective scientific terms used for studying the mechanism by which variations are created and inherited
Give any two distinctive features of Dryopithecus.
Explain how, characteristics (or traits) are inherited through genes.
State one characteristic which shows that the birds are very closely related to dinosaurs.
"Only variations that confer an advantage to an individual organism will survive in a population". Do you agree with this statement? Give reason for your answer.
Out of the wing of a bird, wing of an insect and the wing of a bat :
which two are analogous organs?
State the meaning of inherited traits and acquired traits. Which of the two is not passes on the next generation? Explain with the help of an example.
The idea of mutation was brought forth by:
The first fossil of human form, discovered was ______.
