Clasificación de los animales vertebrados e invertebrados

What is a defining characteristic of vertebrate animals?

• They have an external shell.

• They have an internal skeleton formed by bones and cartilage.

• They are all cold-blooded.

• They only live in water.

What is the main function of the skeleton in vertebrate animals?

• To help them digest food.

• To give shape, firmness, and protection to the body.

• To allow them to change color.

• To produce milk for their young.

How many main groups are vertebrate animals classified into?

• Three

• Four

• Five

• Six

Which of the following describes birds?

• They have mammary glands and feed their young with milk.

• Their skin is covered in scales or a shell.

• They have wings, a body covered in feathers, and a beak without teeth.

• They are primarily aquatic and undergo changes in their body during their life cycle.

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What is a defining characteristic of amphibians?

• They are primarily aquatic vertebrates with body changes during their life cycle.

• They are terrestrial vertebrates that lay eggs.

• They are aquatic invertebrates with gills.

• They are vertebrates with a hard exoskeleton.

What are the small skeletal elements found in the fins of fish called?

• Vertebrae

• Radios

• Gills

• Scales

What is the main characteristic that distinguishes invertebrates from vertebrates?

• Invertebrates live only in water.

• Invertebrates have a soft body.

• Invertebrates do not have a vertebral column or skeleton.

• Invertebrates are always smaller than vertebrates.

Which of the following describes arthropods?

• They are invertebrates with a soft body and no appendages.

• They are vertebrates with an exoskeleton.

• They are invertebrates with a hard exoskeleton that provides protection and support.

• They are invertebrates that can only move by crawling.