Animal Skeletons and Exoskeletons

The video tutorial introduces vertebrates, animals with a backbone and internal skeleton, including mammals, birds, reptiles, amphibians, and fish. It contrasts them with invertebrates, which lack a backbone and often have an exoskeleton made of chitin. The exoskeleton provides shape, protection, and prevents water loss. The video explains the molting process, where invertebrates shed their exoskeleton to grow a new one. The tutorial concludes with a teaser for the next video on shells.

Which of the following animals is considered a vertebrate?

• Jellyfish

• Fish

• Octopus

• Ant

What is one of the primary functions of the skeleton in vertebrates?

• To provide camouflage

• To help in photosynthesis

• To aid in digestion

• To support the body and protect organs

Which characteristic is true for invertebrates?

• They lack a backbone

• They have an internal skeleton

• They all have a backbone

• They are all aquatic

Which of the following animals is NOT an example of an invertebrate?

• Lobster

• Scorpion

• Bird

• Worm

What is an exoskeleton primarily made of?

• Collagen

• Keratin

• Chitin

• Calcium

Which of the following animals has an exoskeleton?

• Cat

• Frog

• Dog

• Bee

Which of the following is NOT a function of an exoskeleton?

• Producing energy

• Aiding in movement

• Protecting from water loss

• Providing shape

What is a common feature of both vertebrate and invertebrate skeletons?

• Both are flexible

• Both are external

• Both provide structural support

• Both are made of chitin

What is the process called when invertebrates shed their exoskeleton to grow?

• Regeneration

• Molting

• Photosynthesis

• Metamorphosis

Why do animals with exoskeletons need to molt?

• To reproduce

• To migrate

• To grow larger

• To change color