They harm the atmosphere which is bad for the earth since the atmosphere contains all the air
No, it cannot because codominance is the expression of both alleles coming forth from each parent. One parent would be R(A)R(A) and the other parent would be R(B)R(B). Their offspring would only be able to be R(A)R(B). They could not be homozygous.
Of the object has a big amount of density
Answer:
1. Hard
2. Malleable
3. Ductile
4. Good electrical conductor
5. High melting point