Classification of Organisms

1.2 Classification of Organisms

1.2

Classification of Organisms

Classification of organisms

Animals

Plants

Invertebrates

Vertebrates

Non-Flowering Plants

Flowering Plants

1) ANIMALS

Invertebrates

Without legs

Without segmented body

With segmented body

1. Sponge

2. Corals

1. Earthworm

2. Leech

Vertebrates

Vertebrates
Fish	Poikilothermic Breathe through gills Lays eggs Undergo external fertilisation
Amphibians	Poikilothermic Young amphibians - breathe through gills Adult amphibians - breathe using lungs and moist skin Undergo external fertilisation
Reptiles	Poikilothermic Breathe through lungs Produce eggs with a shell Undergo internal fertilisation
Birds	Homeothermic Breathe through lungs Produce eggs with hard shell Undergo internal fertilisation
Mammals	Homeothermic Breathe through lungs Give birth and nurse their young Undergo internal fertilisation

2) PLANTS

Non-Flowering Plants

Moss

Fern

Conifer

* Reproduce by producing spores

* Non-vascular

* Reproduce by producing spores

* Vascular

* Reproduce by bearing cones

* Vascular

Flowering Plants

Monocotyledons	Dicotyledons
A seed that has one cotyledon is called a monocotyledon	A seed with a pair of cotyledons is called a dicotyledon

	DIFFERENCES
One	Number of cotyledons	Two
Fibrous root	Root	Tap root
Leaves with parallel veins	Leaf	Leaves with network-like veins
Most have non-woody system	Stem	Woody system
Paddy and maize plants	Example	Tomato plant and durian tree

Quick Notes