Fill in the blanks.

1. ______________ makes the study of living organisms systematic and simple.
2. Classification gives an idea about the ______________ of organisms from simpler to more complex ones.
3. The Greek philosopher, ______________ was the first to classify animals.
4. Linnaeus classified all living organisms in two separate ______________.
5. In Linnaeus' general plan of classification, a class has a number of ______________.
6. The members of a genus are much more similar than those of a ______________.
7. Each genus is divided into ______________.