13A
Animals that maintain a relatively constant body temperature are
What is "Endothermic"
Which vertebrates have two-chambered hearts?
What is "fish"
A lamprey is an example of a(n) ________ fish
What is "jawless"
A period of inactivity during the summer is called
What is "estivation"
The part of the shaft below the vane of a bird feather is the
What is "quill"
All vertebrates have (name two characteristics)
What is "endoskeletons, backbones, and skulls"
An animal that eats only plants is a(n)
What is "herbivore"
The shark and the ray are examples of ________ fish
What is "cartilaginous fish"
The name amphibian comes from two Greek words meaning _____________
What is "double life"
What characteristic is unique to birds?
What is "they have feathers"
Snakes often need sunlight to help with their sluggish bodies after a cold night because they are
What is "ectothermic and cold-blooded"
Which organ filters wastes from vertebrates' blood?
When a female fish is spawning, she is releasing ________ into the water
What is "eggs"
(True or False) Amphibians are the only vertebrates that undergo metamorphosis
What is "true"
Birds belong to class
What is "aves"
Cartilage is what to bone?
What is "Cartilage is strong but more flexible than bone"
What is "the brain and the spinal cord"
What is "swim bladder"
(True or False) Frogs use their maxillary teeth for chewing their food
What is "false"
Name two ways that endothermic animals may cool themselves
What is "sweating, large ears, panting"
Studying living things to discover solutions for human problems is called
(True or False) Most fish have skeletons made of bone
What is "true"
List three structures that amphibians may use for respiration
What is "gills (in young), lungs (in most adults), and skin (in most)"
Birds can obtain oxygen both when inhaling and when exhaling because they have special structures called ____________ attached to their lungs
What is "air sacs"