Defining Features Of Animal And Plant Phylums

Defining Features of Animal and Plant Phylums Animalia - Chordata • • •

Hollow nerve chord running dorsally Gill clefts in the pharynx (at some point in their life history) Notochord (at some point in their life history)

Animalia - Echinodermata • • •

Bilaterally symmetrical as larvae but show five-rayed symmetry as adults Calcareous endoskeleton Water vascular system

Animalia - Mollusca •

Usually unsegmented

Animalia - Anthropoda • • •

Segmentented Invertebrate Thickened chitinous cuticle forming a exoskeleton

Animalia - Annelidia • • • • •

Segmented Soft, elongated body Muscular body wall Blood system Nervous system

Animalia – Nematoda • • • •

Slender Unsegmented Circular (in a cross section)

Animalia – Platyhelminthes • • •

Dorsoventrally flattened Bilaterally symmetrical Epidermis and gut separated by a solid mass of tissue

Animalia – Cnidaria • •

Only one opening to the gut Radially symmetrical

Thomas Sturges – Allard Bishop Ramsey 6th Form

A2 Level Biology Plant Growth Substances

• •

Simple two-layered body with a primitive nerve net between the two layers Stinging cells on the tentacles fringing the mouth

Animalia – Porifera • • • •

Simple body enclosing a single central cavity or penetrated by many inter-connecting cavities Body wall consists of an outer layer of epithelium separated from an inner layer of ciliated choanocytes by a mesogloeal layer No nerve cells No muscle cells

Plantae – Angiospermophyta • •

Reproductive organs are carried in flowers Stamens and carpels are typically surrounded by sterile leaves (petals and sepals)

Plantae – Coniferophyta • Simple, often needle-like leaves • Bear megasporangia in cones (usually) Plantae – Filiconophta • •

Have roots, stems and large leaves Fronds (large leaves) bear the sporangia

Plantae – Bryophyta • •

Non-vascular Either thaloid or differentiated into stems and leaves

Thomas Sturges – Allard Bishop Ramsey 6th Form

A2 Level Biology Plant Growth Substances