Classification
- Created by: Emily Cartwright
- Created on: 28-05-14 17:04
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- Classification
- Kingdoms
- Prokaryote Kingdom
- Prokaryotic cells
- E.g. All bacteria. Saprophytic/Autotrophic feeders
- No specialised structures
- Much smaller than eukaryotic cells
- No nucleus
- Cell wall made of murein
- Prokaryote Kingdom
- In the hierarchical system, the kingdoms are subdivided into phyla, which are furthur divided into classes
- Some phyla contain more species than others and each phylum includes organisms based on a shared body plan
- The kingdom 'Animalia' is divided into 9 phyla, which can be grouped into non-chordates or invertebrates (95%) and chordates or vertebrates (5%)
- Some phyla contain more species than others and each phylum includes organisms based on a shared body plan
- Non-chordates (invertebrates)
- Porifera
- e.g. sponges
- Cnidaria
- e.g. jellyfish, hydras, sea anemones
- Nematoda
- e.g. rotifers and nematodes
- Mollusca
- e.g. bivalves, snails and slugs, octopus and squid
- Annelida
- e.g. earth worms, leeches and marine worms
- Long, thin segmented body
- A body divided internally by partitions
- A head end with a primitive brain and a nervous system running the length of the body
- A hydrostatic skeleton
- A thin, permeable skin through which gas exchange occurs
- A closed circulatory system
- Specialised segments responsible for different functions
- e.g. earth worms, leeches and marine worms
- Echinodermata
- e.g. sea cucumbers, sea urchins
- Arthropods
- e.g. arachnids, crustaceans, millipedes, centipedes and insects
- A body divided into segments
- A body furthur divided into a head, thorax and abdomen
- A hard outer exoskeleton made of chitin
- Waterproof and therefore reduces water loss in terrestrial arthropods
- Provides a point of attachment for muscles
- Protects internal organs
- It is hard and fixed in size and shape and does not grow with the animal
- A well developed brain
- Pairs of jointed legs
- A fluid filled body cavity (haemocoel) which surrounds the body organs
- e.g. arachnids, crustaceans, millipedes, centipedes and insects
- Porifera
- Chordates
- Cordata
- Fish
- Body covered in scales
- Gas exchange via gills
- Single, closed circulation
- Reproduction via external fertilisation
- Usually little or no parental care
- Amphibians
- Body covered with moist skin
- Gas exchange via skin and simple internal lungs
- 'primitive' double, closed circulation
- Reproduction via external fertilisation
- Usually little or no parental care
- Reptiles
- Body covered with dry, waterproof scales
- Gas exchange via internal lungs
- Double, closed circulation
- Reproduction via internal fertilisation. Embryo develops in amniotic egg
- Parental care shown in some species
- Birds
- Body covered with feathers
- Gas exchange via lungs with air sacs
- Double, closed circulation
- Reproduction via internal fertilisation. Embryo develops in amniotic egg
- Parental care shown in most species
- Mammals
- Body covered with fur/hair
- Gas exchange via well developed lungs
- Double, closed circulation
- Reproduction via internal fertilisation. Embryo develops internally
- High degree of parental care
- Fish
- Cordata
- Phylum: Arthropods, Class: Insects
- A body divided into segments
- A body furthur divided into a head, thorax and abdomen
- Three pairs of jointed legs
- Two pairs of wings
- Compound eyes
- A hard outer skeleton made of chitin
- Openings on the exoskeleton called spiracles leading to a branched, chitin lined system of tracheae
- Tissues supplied directly with oxygen
- An open circulatory system lacking haemoglobin
- A complete or incomplete metamorphosis
- In the evolution of some insect groups, some features may have been lost
- Kingdoms
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