An animal without a backbone is known as

• exoskeleton
• endoskeleton
• invertebrate
• vertebrate

An animal with an internal skeleton

• endoskeleton
• exoskeleton
• invertebrate
• vertebrate

An animal with a backbone

• vertebrate
• invertebrate
• ectothermic
• endothermic

An animal with an external skeleton

• exoskeleton
• endoskeleton
• endothermic
• ectothermic

Another name for cold-blooded

• ectothermic
• endothermic
• vertebrate
• invertebrate

Another name for warm-blooded

• endothermic
• ectothermic
• exoskeleton
• endoskeleton

Which of the following is a vertebrate?

• mammal
• sponge
• arthropod
• mollusk

Which of the following is a vertebrate?

• bird
• sponge
• annelids
• echinoderm

Which of the following is an invertebrate?

• sponge
• fish
• amphibian
• reptile

Which of the following is an invertebrate?

• arthropod
• reptile
• bird
• mammal