Fish Basics
What do fish use to obtain oxygen from the water?
Gills
Bony fish have these.
Bones
____ is an amphibian with a tail.
What is a salamander?
Ectotherms regulate their body temperature using this.
External sources
Mammals have this body covering at some point in their lives.
Hair
Most fish are covered with this.
Scales
What fin provides much of the forward thrust when most fish swim?
The caudal fin, or tail fin.
A cold-blooded vertebrate that lives partly in water and partly on land.
Amphibian
Name two birds that cannot fly.
Ostriches and penguins.
Female mammals produce milk in these glands to nurse their young.
Mammary glands
What helps most fish steer and move through water?
fins
The skeletons of cartilaginous fish are made of this.
Cartilage
Turtles that spend their entire lives on land called ____.
What are tortoises?
An animal with a constant temperature, also known as warm-blooded.
Endotherm
Animals that carry their babies in a pouch
Marsupials
This organ allows bony fish to control their buoyancy.
A swim bladder
What is the process of releasing eggs called?
Spawning
Amphibian skin is smooth and covered with this.
Mucus
This type of feather covers the outside of a bird.
Contour feathers
Placental mammals are named for this organ, which grows along the wall of the uterus.
The placenta
This part controls the movement of water through a fish’s gills.
The operculum
Why can't most fish breathe air using lungs like humans?
Their gills are adapted to extract dissolved oxygen from water.
The state of inactivity that amphibians may enter during hot, dry weather is called ____.
What is estivation?
Name two ways feathers help birds survive.
Feathers provide insulation, help many birds fly, and can provide camouflage.
This subclass of mammals lays eggs. The platypus and the echidna belong to it.
Prototheria (monotremes)