Well there are many but the surface of the earth is the material violin one outer core (if that makes sense
Below are the choices, the answer is no. 3:
1) The virus was descended from a common ancestor of bird, pig, and human flu viruses.
2) The infected individuals happened to be infected with all three virus types.
3)Related viruses can undergo genetic recombination if the RNA genomes mix andmatch during viral assembly.
4)The human was likely infected with various bacterial strains that contained all three<span>RNA viruses.</span>
Answer:
Toxic chemicals is a major cause of water pollution. In most cases, the toxic chemicals came from the residual from production process after companies done making their product
Explanation:
Carbon dioxide is a byproduct of respiration while oxygen is a byproduct of photosynthesis.
Remember that a byproduct is a secondary product that is made in the synthesis of another. It is unintended and excreted.
A .<span>Decomposition is a chemical change because the organism is broken down into new substances.</span>
