Sharks can also be called
Sharks dont have a...
ray finned fishes have..
finned fishes have...
Amphibians were the first
tetrapod
reptiles
ectothermic means:
Dinosaurs are considered reptiles that were...
Birds
what were the early functions of feathers prior to flight usage?
other adaptations that birds have that allow flight
Mammals are...
what are the three mammalian groups?
Platypus and echidnas are...
Marsupial offspring complete development...
placenta
eutherians
ecology
biosphere
the biosphere is a ___ system
abiotic factor
predation
competition
5 primary biomes
climate
biome