Starfish & Spiders
Compare and contrast the following
different species of invertebrate
Similarities
•Both of them carry their eggs until it hatches
•Both doesn’t have spine. ( Invertebrate)
•Both can act as a food for human
•Both heterotrophy
taging system for the spider
m, and stages 10 to 21 provide
on of later development
Spider
Differences
Starfish
• Only Sexual reproduction
• Both Sexual, Asexual reproduction
• Take care of the offspring by sharing
food, by feeding them ooze from their
mouth.
• Do not care of the young after birth
because they don’t have brain
• When they hatch, mother spider
takes care of everything, but when
it’s time to be independent, they
learn how to hunt by itself.
• After it is fertilized, the thin layer o
f clearly visible liquid form a body
shape which is a young starfish
• There are total 25 stages.Stage
1 to 9 work on stage, from stage
10 to 21 provide high resolution.
• Once the eggs are fertilized, the
cell’s embryo grows as a larva
form ( 15 stages)
Embryo
development of
starfish
A Young Starfish
Spider’s embryo
Young Spiders
attached to the
mother’s back