How, why, and when are chromosomes formed within a nucleus?

Which best explains why viruses do not have special structures or enzymes that allow them to make their own food? viruses can use energy in living cells that they infect. viruses can replicate inside a host that they infect. viruses can cause contagious illnesses in host cells. viruses integrate their rna or dna into infected cells.

Explain why phospholipid molecules form a bilayer. (3 marks)

What are the most explosive events that occur on the sun? umbras solar flares solar winds prominences