What is that?
This group includes Lancelets, Tunicates, Fish, Amphibians, Reptiles, Birds, and Mammals.
What are Chordata?
This structure will eventually form the spinal cord in vertebrates.
What is the hollow Nerve Cord?
These structures protect the body of fish.
What are scales?
This type of reptile has no legs.
What are snakes?
These mammals include primates and rodents.
What are placental mammals?
What are Fish?
These paired structures in the throat may develop into gills or lungs.
What are Pharyngeal Pouches?
This structure is found in bony fish and helps them move in water.
What is a swim bladder?
This reproductive structure has a tough, leathery shell that keeps it from drying out and protects the embryo.
What is an amniotic Egg?
This structure helps bring air into the lungs.
What is the diaphram?
These animals has a 3-chambered heart and was likely related to the ancient lobe-fish.
What are amphibians?
This structure is different in each type based on their eating habbits.
What is a beak?
These are the main characteristics of fish.
What are gills, fins, and scales?
These animals have a four-chambered heart and lack a bladder.
What are birds?
This structure helps mammals maintain their body temperature.
What is hair?
These animals use lungs for respiration and have thick, dry skin.
What are Reptiles?
This gland produces milk for the offspring in mammals.
What is the mammary gland?
These fish have a skull, but no vertebral column.
What are jawless fish?
These structures allow birds to be more aerodynamic.
What are lightweight bones and feathers?
This type of mammal gives birth to live young that are not fully developed, and raise them in pouches.
What are marsupials?
These animals include Monotremes and Marsupials.
What are mammals?
This structure provides food and oxygen to an embryo as it develops inside the mother.
What is a placenta?
This type of fish includes sharks, skates, and rays.
What are cartilaginous?
This reptile is the closest living relative to birds.
What are crocodiles?
This type of mammals includes Echidna and the duckbilled platypus. They are the only mammals that lay eggs.
What are monotremes?