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प्रश्न
According to de-Vries what is saltation?
उत्तर
According to de Vries, saltation is a single-step large mutation that leads to speciation
संबंधित प्रश्न
Define evolution. How does it occur?
"We cannot pass on to our progeny the experiences and qualifications earned during our life time". Justify the statement giving reason and examples.
With the help of suitable examples, explain why certain traits cannot be passed on to the next generation. What are such traits called?
Why are traits acquired during the life-time of an individual not inherited?
A black mouse mates with a brown mouse, and all the offsprings are black.
(a) Why are no brown offsprings produced?
(b) If two of the black offsprings mate with each other what kind of offspring would you expect and in what proportions? Give reason for your answer.
Match the terms given in column I with those given in column II :
| Column I | Column II |
| (1) Fossil | (a) A famous evolutionist |
| (2) A theory of evolution | (b) Survival of the fittest |
| (3) Probable ancestor of birds | (c) Petrified remains of prehistoric life |
| (4) Charles Darwin | (d) Father of genetics |
| (5) Gregor Mendel | (e) Archaeopteryx |
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.
Complete the statement by choosing correct options from below .
Evolution means -- -- -- --.
The first systematic explanation of the concept of evolution was given by ______.
Which of the following is the correct pair?
