The Most Successful Animals on EarthThe Most Successful Animals on Earth
VARIETY
Hermit Crab
Fairy Shrimp
Centipede
Horseshoe
Crab
Size
What Is Different about Each of These Animals?
Color
Shape
Method of Movement
What Do These Animals Have In Common?
Jointed Legs
Exoskeleton
Segmented Body
Distinct Head
Compound Eyes (most cases)
Centipedes, Millipedes, Sow Bugs, Pill Bugs
Myriapods
Crustaceans
Crayfish, Lobsters, Crabs, Shrimp
Mouthparts modified into pincers or fangs
Head, Cephalothorax,
(Thorax & Abdomen fused together)
6 – 8 Pairs Simple Eyes
4 Pairs (8) Walking Legs
Some have Stingers
Carnivores
Terrestrial
SPINNERETS
Scientists at NASA wondered what happens when you get a spider stoned.
The experiments show that common house spiders spin their webs in different ways according to the psychotropic drug they have been given. They discovered the more toxic the chemical, the more deformed was the web.
Spiders on marijuana started spinning webs but appeared to lose concentration about half-way through.
Those on Benzedrine - "speed" - spin their webs "with gusto, but without much planning leaving large holes”.
Caffeine makes spiders incapable of spinning anything better than a few threads strung together at random.
On chloral hydrate, an ingredient of sleeping pills, spiders "drop off before they even get started".
Most Numerous of All Animals
Has A Three Part Body Plan
Head, Thorax, AbdomenLife Cycle is Metamorphosis –
Complete & Incomplete
First Animals to Fly – Most Adults Do Fly
Divided Into Many Orders
O R D E R S
COLEPTERA – Beetles, Weevils (Shield Wing)
DIPTERA – Flies, Mosquitoes ( 2 Wings)
LEPIDOPTERA – Butterflies, Moths (Scaled Wing)
COMPLETE METAMORPHOSIS
HYMENOPTERA– Bees, Wasps, Ants (Membrane Wings)
ORTHOPTERA – Grasshoppers, Crickets (Leather Wings)
HEMIPTERA – True Bugs (Half Wings)
Catherine Patterson
Santa Rita High School - 2007
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