For the following questions answer them individually
In stratosphere, which of the following elements acts as a catalyst in degradation of ozone and release of molecular oxygen ?
What type of ecological pyramid would be obtained with the following data?
Secondary consumer:120 g,
Primary consumer: 60 g
Primary producer: 10 g
The experimental proof for semiconservative replication of DNA was first shown in a
Which of the following has proved helpful in preserving pollen as fossils ?