What is the life cycle of insects?
It varies but most hatch from eggs
How is it's growth constrained?
by the inelastic exoskeleton
How else?
development involves a series of molts
How many stages of metamorphosis are there?
Four
What are insects?
a class of invertebrates
How many body parts do they have?
Three
What are they?
head, thorax and abdomen
Are they diverse?
Yes
How many species?
more than a million
How many extant species are there?
estimated at between six and ten million
What does that represent?
represent over 90% of the differing animal life forms on Earth.
What kind of environment can they be found?
nearly all
Even in oceans?
Yes
What have they found in the Paleozoic Era?
Fossilized insects of enormous size
What kind was found in this era?
giant dragonflies
How big?
with wingspans of 55 to 70 cm
Have they coevolved with anything?
Yes
What?
flowering plants.
What is the metamorphosis stage of an adult?
series of nymphal stages
What do they lack when the go through 3-stage metamorphosis?
a pupal stage