List 5 famous comets, and explain when the next one will be visible from Earth?

What is the difference between a scientific hypotheses and a scientific theory?

Recombinant dna is the merging of dna from unrelated organisms to create new genetic varieties is assembled in the lab from mononucleotides was part of the green revolution of the 1960s is pollination of one plant by another of the same species is cross-pollination of one plant by a different species

Need with these questions . need the answers in a rush for these questions are the answers i put down are correct or not? ?