Biology Exam 1/2 9th grade
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29 Terms
no symmetry
porifera
radial symmetry
cnidaria, echinoderm
bilateral symmetry
annelida, molluscs, arthropoda
no segmentation
porifera, cnidaria, molluscs, echinoderm
segmentation
annelida, arthropoda
single opening
porifera, cnidaria
two openings
annelida, molluscs, arthropoda, echinoderm
no nervous system
porifera
simple nervous system
cnidaria
nervous system + brain
annelida, arthropoda
nervous system but no brain
molluscs, echinoderm
no circulatory system
porifera, cnidaria, echinoderm
open circulatory system
molluscs, arthropoda
closed circulatory system
annelida
cold-blooded
fish, amphibians, reptiles
warm-blooded
birds, mammals
gills for breathing
fish
lungs for breathing
amphibians, reptiles, birds, mammals
external fertilization
fish, amphibians
internal fertilization
reptiles, birds, mammals
external development
fish, amphibians, birds, reptiles
internal development
mammals
ammonia as waste
fish
urea as waste
mammals
uric acid as waste
reptiles, birds
scales on body
fish, reptiles
moist skin
amphibians
feathers
birds
fur or hair
mammals