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ivanas science teste

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An animal whose body temperature changes depending on the environment
Ectotherm

The major three groups of fish are distinguished from one another based one what characteristic?
By the kind of skeleton they have.
What happens to an object when its buoyancy is less than its weight?
It sinks.
What does the word "amphibian" mean?
Double-life

How many chambers are there in an amphibian heart?
three
Snakes have only one what?
Lung
What groups of animals evolved from reptiles?
Birds and Mammals
What is one thing sharks cant do?
Stay still
What are the small bones that line up in a row?
vertebrate
What are the skeletons of hagfish and lamprey made of?
Cartilage
What is the structure called that helps bony fish stabilize its body at different depths
Swim Bladder
What are the upper chambers of an amphibian heart called?
Atria
Which reptile is covered with a protective shell?
turtle
What type of fertilization is used by most fish?
External Fertilization
What are the hardened remains of a living thing that existed long ago?
Fossil
During metamorphosis, salamander lose what?
Their Gills
What does the yolk do in an egg
Provides food
What kind of rocks do fossils frequently appear in?
sedimentary rocks
Chordates sometimes dont have what is it?
spinal column

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