Which of these animals are vertebrates?

My body is moist and smooth, I lay eggs, and live in or near the water. What am I?

My body is warm and covered in feathers. I lay eggs which hatch into ducks. What am I?

My body is warm, I have fur, feed my young on milk, and have live births. What am I?

I am covered in dry scales and I lay eggs. What am I?

My body is cold, am covered in scales, use gills to breathe under water, and I lay eggs. What am I?

Which of these characteristics does NOT describe reptiles?

Which of these animals are mammals?

What word matches this definition:

Putting things into groups based on similar traits and scientific definitions

Which are the 5 groups of vertebrate animals?

What is a vertebrate?

Which of the following is NOT a vertebrate?

Humans are vertebrates.