Answer:

1-By classifying organisms, it is easier and more convenient to STUDY their characteristics. Similarities EXHIBITED by various entities allow us to categorize different entities into a class and hence study the group as a whole.

2-There are seven major levels of classification: Kingdom, Phylum, Class, Order, Family, Genus, and SPECIES. The two main kingdoms we think about are plants and animals. SCIENTISTS also list four other kingdoms including bacteria, archaebacteria, fungi, and protozoa.

3-It is necessary to classify organisms because: ... It helps in the identification of living organisms as well as in understanding the diversity of living organisms. Classification helps us to learn about different kinds of plants and animals, their features, similarities and differences.

4-

The organisms which have ancient body designs that have not changed much are called primitive organisms or lower organisms. These are simple life forms. On the other HAND, the organisms that have acquired their particular body designs relatively recently, they are called advanced organisms or higher organisms.