Eg phylum porifera
Sponges

Symmetry
Radial but some lack symmetry

Motility
Sedentary

Choanocytes
Inner flagellated cells

How do they feed
Suspension feeders

Inner flagellated cells
Chaonocytes

Feed on
Phytoplankton

What do choanocytes do
Sweep water through the sponges body

Amoebocytes
Supportive skeletal fibers

Amoebocytes made of
Spongin n spicules

Spongin n spicules are
Protein and mineral particles

Suspension feeders also known as
Filter feeders

Filter feeders are
Sifting through food particles

Do sponges have nerves n muscles
No

Which phylum first showed true tissue
Cnidarians

Cnidaria- phylum
Cnidarian

Cnidarian ex
Hydra jelly fish corals sea anemone

Symmetry
Radial

Types of tissues
Ectoderm and endoderm

Oldest known animal fossils
PreCambrian

Could  softball the animals be the first to have  arose
No

What ignited d cambrian explosion
Hard shell led to feeding, motility, protection complex predator prey relationship. Atmospheric oxygen help mobility

Difference between colonial organisms and multicellular
Multicellular organisms are extensively specialized

Define blastula
Hollow ball of cell

Define gastrula
1 side of blastula folds inwards

What is a larvae
immature individual that looks different from the adult. Larva undergoes a major change of a body form Where an adult undergoes sexual maturation

hydrostatic skeleton
In soft-bodied animals, a noncompressible fluid in the body cavity provides a rigid structure against which muscles contract, moving the animal.