ch 16 quiz Flashcards
heterotophs
cant produce food
look the same on both sides
bilateral symmetry
concentration of nervous system in the head
cephilization
what becomes the mouth in a protosome
first embryonic opening
which phylum has microscoping animals with significant ecological impact.
nematoda
what % of animals are invertibrae
97
have to germ layers
diploblastic
phylum that can regenerate body parts
Echinodermata
what is the function of a coelom
shock absorption
Which symmetry type is most useful for sessile organisms?
radial
In deuterostome development, what becomes the anus
first embryonic opening
phylum includes organisms with jointed appendages
Arthropoda
Cnidaria’s
Can exist as polyp and medusa
Which germ layer is considered the middle layer
mesoderm
phylum includes organisms like earthworms
Annelida
key characteristic of Porifera
no true tissues
phylum includes octopuses
Mollusca
outer germ layer
Ectoderm
How are pinworms spread
Through direct ingestion of eggs
