In 1859, Charles Darwin published On the Origin of Species where he explained the Theory of Natural Selection. True or False

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.

Which of the following systems in absorbing oxygen and releases carbon dioxide

What is the name for a substance formed in a chemical reaction