Crustaceans and Arthropods

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What is the largest group of living organisms based on the number of species?

Arthropods are the largest group of living organisms.

What are crustaceans?

Crustaceans are one of the largest groups of arthropods.

What is the external skeleton of arthropods like?

Arthropods have a soft external skeleton.

What are the body parts of crustaceans?

Crustaceans have bodies consisting of a head, thorax, and abdomen.

How many pairs of antennae do crustaceans have?

Crustaceans have two pairs of antennae, though this statement mentions three pairs.

Do crustaceans have internal or external fertilization?

Crustaceans have internal fertilization.

How do crustaceans breathe?

Crustaceans have gills for a respiratory system.

Are all crustaceans predators?

Not all crustaceans are predators; they can also be herbivorous.

What type of circulatory system do crustaceans have?

The statement incorrectly mentions crustaceans having a closed circulatory system; they actually have an open circulatory system.

What is the function of paired glands in crustaceans?

Crustaceans have paired glands for excreting metabolic waste.

Is reproduction in crustaceans associated with disease?

The statement mentioning reproduction always involving disease is incorrect.

Do crustaceans have organs for chemical sensing?

Yes, crustaceans have organs for chemical sensing.

What is the symmetry of crustacean bodies?

Crustacean bodies are symmetrical.

Where do all crustaceans live?

Not all crustaceans live in the water; many do, but not exclusively.

Can crustaceans be both herbivores and predators?

Yes, crustaceans can be herbivores, predators, or omnivores.

Can some crustaceans be parasites to humans?

Yes, some species of crustaceans can be parasites to humans.

Do crustaceans have only one pair of antennae?

This statement is incorrect; crustaceans typically have two pairs of antennae.

Do crustaceans have organs of balance?

Crustaceans do have statocysts, which are organs for balance.

What is the size of a Japanese spider crab?

A Japanese spider crab can grow up to 45 cm.

How large can American lobsters grow?

American lobsters can grow up to 107 cm.

Are crustaceans the main diet for whales?

Some crustaceans, like krill, form an important part of the diet for some whales.

Do crustaceans have segmented bodies?

Yes, crustaceans have clear segmentation in their bodies.

Do all crustaceans have gills for respiration?

Yes, all species of crustaceans have gills for breathing.

Are crustaceans capable of external fertilization?

Some species of crustaceans are capable of external fertilization, although internal fertilization is more common.




Test Your Knowledge

Select the correct option


1. What is the largest group of living organisms based on the number of species?

Arthropods

Mammals

Plants

Fungi

2. What are crustaceans?

A type of plant

Mollusks

One of the largest groups of arthropods.

Bird species

3. What is the external skeleton of arthropods like?

Hard and rigid

Soft and flexible

Feather-covered

Non-existent

4. What are the body parts of crustaceans?

Head, thorax, and abdomen

Only a head and tail

Single body segment

Two wings and a tail

5. How many pairs of antennae do crustaceans have?

Three pairs

One pair

Two pairs

Four pairs

6. Do crustaceans have internal or external fertilization?

Internal fertilization

External only

Both internal and external, with internal being more common

Asexual reproduction only

7. How do crustaceans breathe?

Through their skin

Using gills

Using lungs

Through diffusion

8. Are all crustaceans predators?

Yes, all are predators.

No, they are herbivores.

No, they can also be herbivorous.

Yes, but only in summer.

9. What type of circulatory system do crustaceans have?

Open circulatory system

Closed circulatory system

Mixed circulatory system

None of the above

10. What is the function of paired glands in crustaceans?

Excreting metabolic waste

Producing hormones

Secreting lubricants

Providing camouflage

11. Is reproduction in crustaceans associated with disease?

No, it is not always associated with disease.

Yes, reproduction always causes disease.

Yes, but only under extreme conditions.

No, they reproduce aseptically.

12. Do crustaceans have organs for chemical sensing?

Yes, they do.

No, they rely on sight only.

No, they use echolocation.

Yes, but only during mating.

13. What is the symmetry of crustacean bodies?

Symmetrical

Asymmetrical

Radial symmetry

No defined symmetry

14. Where do all crustaceans live?

Only in water

Most live in water, but not all exclusively

Only on land

In trees

15. Can crustaceans be both herbivores and predators?

Yes, they can be herbivores, predators, or omnivores.

No, they are strictly carnivorous.

No, they can only be herbivores.

Yes, but only during certain periods.

16. Can some crustaceans be parasites to humans?

No, they are harmless to humans.

Yes, some species can be parasites to humans.

No, they are only predators.

Yes, but only in tropical regions.

17. Do crustaceans have only one pair of antennae?

No, they typically have two pairs of antennae.

Yes, they have one pair.

No, they have none.

No, they have three pairs.

18. Do crustaceans have organs of balance?

Yes, they have statocysts.

No, they rely purely on gravity.

Yes, but only in their larval stage.

No, they use their antennae for balance.

19. What is the size of a Japanese spider crab?

67 cm

95 cm

33 cm

45 cm

20. How large can American lobsters grow?

107 cm

50 cm

78 cm

120 cm

21. Are crustaceans the main diet for whales?

No, whales primarily eat fish.

Yes, especially species like krill.

No, they only eat plants.

Yes, but only in the winter.

22. Do crustaceans have segmented bodies?

Yes, they have clear segmentation.

No, they are unsegmented.

Only during their larval stage.

Yes, but only in their limbs.

23. Do all crustaceans have gills for respiration?

Yes, all have gills for breathing.

No, some have lungs.

No, they use diffusion instead.

Yes, but only during breeding season.

24. Are crustaceans capable of external fertilization?

No, only internal fertilization

Some are capable, but internal is more common

Yes, all are capable

No, they reproduce vegetatively