Arthropods
This immature stage of insects does not remember the adult
Larva
The larvae of echinoderms exhibit this type of symmetry
Bilateral
The evolution of this type of egg permitted reptiles to move away from water
Amniotic egg
Name a bird that does not fly
Penguin, kiwi, etc
This group of mammals lay eggs
Monotremes
This class of arthropods features 3 body segments and 3 pairs of legs
Insecta
This echinoderm class expels their guts as defense
Holothuroidea (Sea cucumbers)
This clade of reptiles has a flattened head and laterally compressed tail
Crocodilia
This bone adaptation helps to facilitate flight
Hollow bones
This group of mammals have a pouch
Marsupials
This group of arthropods is the most dominant in aquatic ecosystems
Crustacea
This structure allows water to enter the water vascular system
madraporite
These openings differentiate anapsids, diapsids, and synapsids
Temporal fenestrae
This structure is exceptionally large to allow a bird's powerful breast muscles to anchor
Sternum/Keel
All mammals are able to feed their young with milk via these structures
Mammary glands
This respiratory structure found on insects connects to a tracheal system
Spiracle
This class of echinoderms has the mouth on the upper surface
Crinoidea (Sea lilies and feather stars)
This clade of reptiles is endemic to New Zealand
Sphenodontia (tuataras)
These are the two hypotheses explaining the evolution of flight in birds
Arboreal and terrestrial hypothesis
This protein is found in mammal hair
Keratin
This insect order is the largest order among all living things
Coleoptera (beetles)
This specialized structure is unique to Sea cucumbers
Respiratory Tree
This is the largest and most diverse clade of reptiles
Squamata (lizards and snakes)
Birds belong to this group of diapsids
Archosaurs
Mammals are divided into these two clades
Atlantogeneta and Boreoeutheria