What causes a star to shine brightly? the color that is produced
the energy that is released
the amount of gravity that is present
the types of elements that are present

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.

The similarities of organisms in which two areas numbered above provide the best evidence for common ancestry between organisms in both locations?

Crossing over and independent assortment are important activities that occur during meiosis. what is the significance of these activities