INSECTS
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INSECTS
Insects: 80% of all animal species living on our planet. Characteristics of Arthropods: definition, habitat, structure. Insects’ evolution and their characteristics. Insects and ecosystems. Sense organs. Summary.
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INTRODUCTION
-Approximately 80% of all animal species which inhabit the Earth are insects.
-Insects belong to a group known as Arthropoda
-Types of Arthropoda: myriapods, arachnids, insects.
-Trilobites – characteristics of the Arthropoda.
EVOLUTIONARY SUCCESS
-At a given moment in their lives, all insects have 6 legs and a body which is clearly divided into three parts: head, thorax and abdomen.
-The majority of insects can fly.
-The flying speed of the insects
-The size of insects
-Two different life-cycles
-The metamorphosis: butterflies, caterpillars
-Their reproductive capacity
INSECTS AND ECOSYSTEMS
-Insects and the pollination of plants
-Flowers. Nectar and pollen
-The immense majority of insects are herbivorous.
-Praying Mantis: carnivorous insects.
-Bees: Life in colonies
ORGANS OF THE SENSES
-The most important organs their survival are those of sight and smell.
-Ocelli.
-Locusts are the most destructive insects in the world.
SUMMARY |
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