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1.
Birbal Sahni was
2.
England in 1850s, 
before industrialization set in, it was observed that there were more white-winged moths on trees than dark-winged or melanised moths.However, in the collection carried out from the same area, but after industrialization, in 1920, there were more dark-winged moths in the same area, the proportion was reversed
Predict the possible reason for such change
before industrialization set in, it was observed that there were more white-winged moths on trees than dark-winged or melanised moths.However, in the collection carried out from the same area, but after industrialization, in 1920, there were more dark-winged moths in the same area, the proportion was reversedPredict the possible reason for such change
3.
In a given population, the ...A... of occurrence of alleles of a gene is supposed to remain ...B... and even remain the same through generations. Hardy-Weinberg principle stated it using ...C... equation
Choose the correct option for A, B and C to complete the given NCERT statement
Choose the correct option for A, B and C to complete the given NCERT statement
4.
Which of the following provides most evident proof of evolution?
5.
Which set includes only analogous organs?
6.
Study of fossils is called
7.
Hugo de Vries's experimental organism was
8.
A biologist is trying to infer how five closely related species of snakes are related to one another. She noticed that some of the snakes have forked tongues and others do not. Which of the following would help her to distinguish their ancestral state?
9.
Origin of life occurred in
10.
In which of the following situations would evolution would occur
Select the correct using the codes given below
|
Migration |
Selection Pressure |
Variations due to Mutation |
|
I. Absent II. Absent III. High IV. High |
Low High Low High |
Low High High Low |
Select the correct using the codes given below