For which of the following organisms there is no natural death ?

Which of the following organisms was used to establish the semi-conservative nature of DNA?

Which of the following organisms was used to establish the semi-conservative nature of DNA?

Which of the following is involved in early death of insects ?

Which of the following anaphylactic shock may cause death?

The discovery of which of the following group of elements gave a death blow to the Newlands Law-

Which of the following event of organic evolution was a turning point that changed the nature of atmosphere of primitive earth?

Which of the following event of organic evolution was a turning point that changed the nature of atmosphere of primitive earth?