Crustaceans: A Quiz for Grade 9 Students

What are the main body parts of a crustacean?

• Mandibles, exoskeleton, and gills

• Legs, wings, and tail

• Head, thorax, and abdomen

• Shell, fins, and antennae

Describe the life cycle of a crustacean, including the stages it goes through.

• Egg, larva, juvenile, adult

• Egg, pupa, adult, senior

• Infant, toddler, child, teenager

• Seed, sprout, plant, tree

Explain the economic importance of crustaceans in the fishing industry.

• Crustaceans are important in the fishing industry because they are a valuable source of seafood.

• Crustaceans are only used for decorative purposes

• Crustaceans are not important in the fishing industry

• Crustaceans are harmful to the fishing industry

Name three types of crustaceans commonly consumed by humans.

• clam, mussel, oyster

• octopus, squid, eel

• shrimp, crab, lobster

• tuna, salmon, cod

How do crustaceans breathe underwater?

• By absorbing oxygen through their skin

• By using a snorkel-like tube to breathe air from the surface

• By drinking water through their mouth

• Through gills

What is molting in crustaceans and why is it important?

• The process of shedding their exoskeleton to change color; important for mating.

• The process of shedding their exoskeleton to become stronger; important for camouflage.

• The process of shedding their exoskeleton to become smaller; important for survival.

• The process of shedding their exoskeleton to grow a new one; important for growth and development.

Discuss the role of crustaceans in the marine ecosystem.

• They are responsible for causing imbalances in the food web

• They contribute to the depletion of nutrients in the marine ecosystem

• They have no role in the marine ecosystem

• They serve as food for many marine animals, help in nutrient cycling, and contribute to the balance of the food web.

What are some adaptations that allow crustaceans to survive in their habitats?

• Hard exoskeletons, gills, specialized appendages

• No exoskeleton, fins, wings

• Feathers, scales, fur

• Soft exoskeletons, lungs, no appendages

Explain the process of reproduction in crustaceans.

• External fertilization in water

• Reproduction through spores

• Asexual reproduction through budding

• Internal fertilization on land

Which of the following is a primary diet component for many crustaceans?

• Wood

• Plankton

• Leaves

• Stones