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BY 2.1 ­ ALL ORGANISMS ARE RELATED THROUGH
THEIR EVOLUTIONARY HISTORY
Biodiversity ­ A measure of the number of different organisms on our planet.

Species ­ A group of organisms that can interbreed successfully to produce fertile offspring.

Habitat ­ A place where plants and animals can obtain the food,…

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Charles Darwin's Theory of Evolution

Only ­ Over production of offspring
Cows ­ Consistency in numbers
String ­ Struggle for existence
Violins ­ Variety amongst offspring
Simultaneously ­ Similarities (Like produce like)
Forever ­ Formation of a new species

MODEL ESSAY ANSWER
All organisms produce a large number of offspring…

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The Binomial System
Introduced by Carl Linnaeus in 1753.
Latin is used as an international language for precise worldwide identification.

Rules:

1) The generic name always comes first and begins with a capital letter
2) The specific name comes second and is all written in lower case
3) Latin names…

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4) Plantae e.g. Mosses

Eukaryotic
Photosynthetic
Multicellular
Autotrophic
Cellulose cell wall

5) Fungi e.g. Yeast

Reproduced by spores
Heterotrophic
Cell wall made of chitin




The Animal Kingdom
3 Phylum's:

1) Annelids e.g. Earthworm, lugworm, leech.
Closed circulatory system
Movement by peristalsis
Long, thin, segmented body
Thin permeable skin for gas…

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5 Classes of Chordates:

1) Birds
2) Amphibians
3) Reptiles
4) Mammals
5) Fish

The Pentadactyl Limb
Homologous structure (similar in origin, despite its function)
One upper limb bone, two lower limb bones and an arrangement of five digits.
Found in mammals, birds, amphibians and reptiles
Presence of a Pentadactyl…

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A tree showing the evolutionary relationships among various biological species that are believed to
share a common ancestor. The more recently diverged the species is, the more closely related they
are to each other.

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