How does nuclear fission take place?

Nuclear fission is

How does circulation take place in round worm?

How does fertilization take place in humans?

Answer the following questions in detail: How is nuclear fission reaction carried out in nuclear power plants?

What is periderm? How does periderm formation take place in dicot stem?

In which region of the sex chromosome does crossing over take place?

In which region of chromosomes does crossing over take place?

How do the interactions take place in the biotic and abiotic factors of ecosystem?

When and where does reduction division take place in the life cycle of a liverwort, a moss, a fern, a gymnosperm and an angiosperm?

How does the communication takes place between cell and organisms?