CHORDATES CROSSWORD

Small marine chordates that are filter feeder of plankton
Lay their eggs with shells but nurse their young after hatchin
These are cold blooded jawless fish and although their ancestors had bony skeletons, modern agnaths have a cartilaginous skeleton.
include frogs, toad and salamanders and appear to live two lives as they live in the water during the early stages and on land as adults
Dry skin with protective scales and are believed to have evolved during a drier climate in Earth’s history
Adapted to flight through the development of hallow bones, large muscles and feathers
Feed by allowing water to pass into their pharynx where food particles are trapped
Have a backbone as their structural axis
This class includes the shark and skates
What class do marsupials belong too
Have three primary characteristics chordates have, but do NOT have a backbone
What class has cold blooded fish have bony skeletons and can be found in salt or fresh water environments.
Some of these skip the metamorphic stage and the young are born as immature adults
Amphi means
Utilize a placenta between the uterus and embryo which results in young being born at a much more advanced stage
are characterized by four limbs, moist skin, and sensitive inner ear structures. Evolved from fish 400 WHAT years ago?