3. Why is it easy to describe an organism's phenotype for a particular characteristic but very difficult to state the genotype?

The sum of an organism's observable characteristics is their phenotype. A key difference between phenotype and genotype is that, whilst genotype is inherited from an organism's parents, the phenotype is not. Whilst a phenotype is influenced the genotype, genotype does not equal phenotype

satellites are frequently used to make observations of the orbit on earth

a and c are the answeres