Show:
Fish
Amphibians & Reptiles
Birds
Mammals
100
A dorsal hollow nerve cord, gill slits, and a notochord are characteristics of what?
What is chordate.
100
Ectotherms with dry, scaly skin that lay amniotic eggs.
What are reptiles
100
Birds bones are?
Hollow and light-weight.
100
Kangaroos and Koalas are?
What is marsupial
200
What are the three classes of fish?
What are bony fish, jawless and cartilaginous.
200
Tough, flexible tissue that is similar to bone.
What is cartilage.
200
Soft, fluffy contour feathers that provide insulation
What are down-feathers.
200
Mammals that lay eggs
What are monotremes
300
The dorsal structure that becomes the backbone in most vertebrates.
What is notochord.
300
Jawless fish have all of the following except: mouth that acts like suckers, exoskeleton, tubelike body, scaleless.
What is exoskeleton
300
Birds repair, reorganize and water proof their feathers through this process.
What is preening
300
The time it takes for an embryo to develop in the uterus.
What is gestation period.
400
Fanlike structures used for balance and steering.
What are fins.
400
A period of inactivity during hot, dry months
What is estivation
400
Upward force that aids in birds flight.
What is lift.
400
Animal whose body temperature stays the same regardless of the temperature of their surroundings.
What is endotherm
500
Fleshy filaments that are filled with blood vessels.
What are gills.
500
Unlike the eggs of fish and amphibians, the eggs of reptiles are?
What is fertilized internally
500
Mockingbirds, crows and jays have three toes facing forward and one facing backward for this purpose.
What is perching on twigs.
500
Humans and elephants are an example of this kind of mammal.
What is placental