Arthropods

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Amphibians

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Arthropods

Nutrition

Subclasses

1. Chelicerata (Arachnids) -Examples: Spiders, scorpions, ticks, mites -Chelicerae (pincers/fangs) as feeding appendages -Book lungs or tracheae for respiration

2. Crustacea -Examples: Crabs, shrimp, lobsters, barnacles -Mostly aquatic -Two main body sections

3. Hexapoda (Insects) -Examples: Ants, butterflies, beetles -Three body parts: head, thorax, abdomen -Six legs, often winged -Most successful and widespread group

Structure & Characteristics

-Segmented body with jointed appendages (legs, antennae, mouthparts)

Bilateral symmetry

Compound eyes and other sensory organs

Exoskeleton made out of chitin

Life Cycle

Most undergo metamorphosis (egg -> larva -> pupa -> adult)

Some reproduce parthenogenetically (a form of asexual reproduction whereby offspring are produced without the embryo being fertilised by a male).

Complex mating rituals in some groups