Patterns in Life: Diversity and Classification Mind Map

Diversity of life means the wide variety of living organisms found on Earth, from microscopic bacteria to large plants and animals, living in different habitats.

When asked about diversity, mention variety, habitat differences, body features, and the need to organise living organisms for study.

Classification is the systematic grouping of organisms on the basis of similarities and differences so that the huge variety of life can be studied easily.

In answers, use words like similarities, differences, identification, systematic study, and relationships among organisms.

Hierarchy of classification is the ordered arrangement of taxonomic categories from broad groups to specific groups: kingdom, phylum, class, order, family, genus, and species.

Remember the order and mention that similarity increases as we move from kingdom towards species.

Five kingdom classification is Whittaker's system that groups organisms into Monera, Protista, Fungi, Plantae, and Animalia using cell type, body organisation, and mode of nutrition.

For a 3-mark answer, write the five kingdoms and at least three bases: cell type, body organisation, and nutrition.

Kingdom Monera includes prokaryotic, mostly unicellular organisms that do not have a well-defined nucleus or membrane-bound cell organelles.

Mention prokaryotic cell, unicellular nature, absence of true nucleus, nutrition modes, and examples.

Kingdom Protista includes mostly unicellular eukaryotes, while kingdom Fungi includes eukaryotic organisms that usually absorb nutrition from dead or living matter.

For comparison questions, write one point each on cell type, cell number, nutrition, and examples.

Kingdom Plantae includes multicellular eukaryotes that generally make food by photosynthesis, while Animalia includes multicellular eukaryotes that ingest food and lack cell walls.

For Plantae versus Animalia, compare nutrition, cell wall, chlorophyll, and mode of obtaining food.

Binomial nomenclature is the scientific naming system in which each organism is given a two-part name: genus name followed by species name.

Write genus first, species second, capitalise only the genus, and underline both words separately if writing by hand.

Fossils are preserved remains or traces of past organisms, adaptations are features that help organisms survive in their habitats, and biodiversity threats are factors that reduce variety of life.

For adaptation answers, always connect feature to advantage. For biodiversity threats, name the threat and its effect.