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Insecta

Insecta. Weitian Sun and Paul Park . Classification and taxonomy. Kingdom: Animalia Phylum: Arthropoda Subphylum : Hexapoda Class: Insecta. Phylogeny and evolution. reproduction. Sexual: individuals develop from zygotes. Asexual: individuals develop from gametes directly.

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Insecta

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  1. Insecta Weitian Sun and Paul Park

  2. Classification and taxonomy • Kingdom: Animalia • Phylum: Arthropoda Subphylum: Hexapoda • Class: Insecta

  3. Phylogeny and evolution

  4. reproduction • Sexual: individuals develop from zygotes. • Asexual: individuals develop from gametes directly. • example: Parthenogenesis

  5. Insects’ Development • holometabolousinsects • complete metamorphosis • gg -> hatch -> nymphs -> grow -> adult • hemimetabolousinsects • incomplete metamorphosis • Egg -> hatch -> nymphs -> grow -> adult holometabolous metamorphosis

  6. Anatomy • Exoskeleton • There are seven main parts of body: mouthparts, antenna, head, thorax, abdomen, legs and wings.

  7. Basic part • Head • Thorax • abdomen

  8. head • Nervous system Central nervous system: brain, sensory, motor, ventral nerve cord Peripheral nervous system: branches of axon from ganglia to muscle cell

  9. Defense and predation • Mimicry • Aposematic colouration • Crypsis • Thick exoskeleton • repulsive odours • disgusting tastes • Irritating sprays • Stingers • Running or flying away

  10. Insects in ecosystem and human relationship • soil turning • Aeration • pest control • pollination • wildlife nutrition

  11. Harmful insects • Parasitic • Damage structure • Destroy agricultures • Transmit diseases • Malaria (mosquitoes) • Typhus (lice) • Plague (fleas) • Yellow fever (mosquitoes)

  12. Beneficial insects • Human perspective • honey from bees (apiculture) • silk from silkworms • cross fertilization of crops • ladybug (beetles) • praying mantis • Ecological perspective • important in food chains • decompose dead animal • Pollination • Parasitism

  13. Thank you for watchingReference • Picture from (http://pakagri.blogspot.ca/2012/01/benefic-and-value-of-insects.html • Image from (www.warrenphotographic.co.uk) • Image from (www.warrenphotographic.co.uk) • Image from(www.flickriver.com) • Source from (http://www.entomology.umn.edu/cues/4015/morpology/ • source from (www.cals.ncsu.edu)

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