2. They are classified into seven levels, namely kingdom, phylum, class, order, family, genus and species.

3. A kingdom consist of a group of organism sharing certain common characteristics.

4. Kingdom is the largest unit of classification and contains the largest unit of classification and contains the largest number of organisms.

5. It is divided into smaller units called phyla.

6. A phylum is subdivided into classes, a class into orders, an order into families, a family into genera and a genus into species.

7. The number of organisms at each level decreases as we go down along the hierarchy. This is due to an increase in the number of similar features of an organisms.

8. The organisms of a species are very similar to one another. However, they still have individual differences.

9. The naming of organisms or biological nomenclature is based on the Linnaeus binomial system.

1. The kingdom plantae includes all plants that are multicellular eukaryotes.
2. Plants are autotrophic and derive energy by photosynthesis.
3. Plants reproduce sexually and are adapted for life on land as well as in water. All plant life cycles involve alternative of generations.
4. The alternative of generations refers to the shifting back and forth between haploid and diploid stages during the life cycle of an organisms. The following are generalizations that apply to an alteration of organisms.

• Any cell of the sporophyte generation is diploid (2n)
• Any cell of the gamethophyte generation is haploid (n)
• The change from sporophyte to gametophyte occurs as a result of meiosis.
• The change from gamethophyte to sporophyte occurs as a result of fertilization.