Invertebrate Identification Quiz

I have 8 jointed legs. I have pedipalps. I have an exoskeleton. What am I?

• Spider

• Crab

• Butterfly

• Snail

Answer explanation

A spider has 8 jointed legs, pedipalps, and an exoskeleton, which are key characteristics of arachnids. Crabs have 10 legs, butterflies have 6, and snails lack an exoskeleton, making 'spider' the correct answer.

I have many jointed legs. I have a long body with 2 legs per section. I have an exoskeleton. What am I?

• Centipede

• Ant

• Worm

• Fish

Answer explanation

A centipede has many jointed legs, a long body with two legs per body segment, and an exoskeleton. Ants have a different body structure, worms lack legs, and fish are entirely different organisms.

I have no legs. I am found in the ocean. I have spiny or bumpy skin. What am I?

• Starfish

• Octopus

• Fish

• Slug

Answer explanation

The correct answer is starfish. They have no legs, are found in the ocean, and typically have spiny or bumpy skin. Octopuses have tentacles, fish have fins, and slugs are not marine animals.

What type of invertebrate is a scorpion?

• Arachnid

• Myriapod

• Annelid

• Echinoderm

Answer explanation

A scorpion is classified as an arachnid, which is a group of joint-legged invertebrates that also includes spiders and ticks. Myriapods, annelids, and echinoderms are different types of invertebrates, making arachnid the correct choice.

What type of invertebrate is a slug?

• Crustacean

• Mollusc

• Insect

• Annelid

Answer explanation

A slug is classified as a mollusc, which is a group of invertebrates that also includes snails, octopuses, and clams. They are characterized by their soft bodies and, in many cases, a shell.

What type of invertebrate is a millipede?

• Annelid

• Myriapod

• Echinoderm

• Insect

Answer explanation

A millipede is classified as a myriapod, which is a subphylum of arthropods that includes centipedes and millipedes. They are characterized by having many body segments and legs, distinguishing them from annelids, echinoderms, and insects.

Which of the following is a mollusc?

• Crab

• Millipede

• Slug

• Earthworm

Answer explanation

A slug is a mollusc, belonging to the class Gastropoda, which also includes snails. Crabs are crustaceans, millipedes are myriapods, and earthworms are annelids, making slug the only correct choice.

I have 8 jointed legs and pedipalps. I have an exoskeleton. What am I?

• An insect

• A mollusc

• An arachnid

• A crustacean

Answer explanation

You have 8 jointed legs and pedipalps, which are characteristics of arachnids, such as spiders and scorpions. Insects have 6 legs, molluscs lack jointed legs, and crustaceans typically have more than 8 legs.

I have a long body with 2 legs per section and an exoskeleton. What am I?

• A myriapod

• An annelid

• An echinoderm

• A mollusc

Answer explanation

A myriapod has a long body with multiple segments, each typically having two legs. They also possess an exoskeleton, distinguishing them from annelids, echinoderms, and molluscs, which have different body structures.

I have 6 jointed legs and 3 main body parts: a head, a thorax, and an abdomen. What am I?

• An insect

• A crustacean

• An annelid

• A mollusc

Answer explanation

You are an insect because insects have 6 jointed legs and a body divided into three parts: head, thorax, and abdomen. Crustaceans have more legs, annelids are segmented worms, and molluscs have different body structures.