Biology species classification




Biology species classification


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Biology species classification


Topic 4.4 - Classification




4.4.1 Define species.

  • Species - a particular kind of organisms; members possess similar anatomical characteristics and have the ability to interbreed and produce fertile offspring.

4.4.2 Describe the value of classifying organisms.

  • The number of species on this planet is huge and this requires a system of ordering and grouping that facilitate the process of studying and investigating the different aspects of these species. Similar species are grouped by their similar characteristics.

4.4.3 Outline the binomial system of nomenclature.

  • Organisms are given two names in this system (binomial). The first name indicates the genus and the second indicates the species. The genus is written in a capital letter and the species in small letters. Also the two names are usually printed or underlined. Naming organisms in this way facilitates the process of identification and helps in overcoming language barriers between scientists.

4.4.4 State that organisms are classified into the kingdoms Prokaryotae, Protoctista, Fungi, Plantae and Animalia.

  • Organisms are classified into the kingdoms Prokaryotae, Protoctista, Fungi, Plantae and Animalia.

4.4.5 List the seven levels in the hierarchy of taxa - kingdom, phylum, class, order, family, genus and species - using examples for each level.

  • Kingdom - Animalia
    Phylum- Chordata
    Class - Mammalia
    Order - Cetacea
    Family - Delphinidae
    Genus - Tursiops
    Species - truncatus
    -Bottlenose Dolphin-

4.4.6 Apply and/or design a key for a group of up to eight organisms.

  • Dichotomous key for: Blue whale, lobster, codfish, ant, monarch butterfly, honey bee, dove, and bat.

1. Is it aquatic (cannot survive on land)?

If yes, go to 2 If no, go to 4

2. Does it have gills?

If yes, go to 3 If no, it is a blue whale

3. Does it have legs?

If yes, it is a lobster If no, it is a codfish

4. Does it have a body divided into 3 distinct parts: head, abdomen, and thorax?

If yes, go to 5 If no, go to 7

5.Does it have a stinging structure on its thorax?

If yes, it is a bee If no, go to 6

6. Does it have wings with visible orange-and-black coloration?

If yes, it is a monarch butterfly If no, go to 7

7. Does it have mandibles as its mouth parts?

If yes, it is an ant If no, go to 8

8. Does it have feathers?

If yes, it is a dove If no, it is a bat


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Biology species classification