Question

Arthropod species do not include: (a) crabs (b) spiders (c) starfish (d) butterflies​

Answer 1

Arthropod species do not include:

• (a) crabs
• (b) spiders
• (c) starfish
• (d) butterflies​

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Answer:

Butterflies

Arthropods are species that have separate body levels. An animal that is invertebrate and had an exoskeleton can be considered an arthropod. An exoskeleton is part of an animal's body that supports it contrasts and harm, it is usually referred to as a "shell".

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Answer 2

Answer:

Starfish is the species that is not included in Arthropod.

$\red\bigstar$ Starfish belongs to echinoderm.

Explanation:

ECHINODERM

• They are spiny bodied animals.

• They are exclusively marine organisms.

• Echinoderms have organ-system level of organization of their body.

• The adults are radially symmetrical , but their larvae is of bilateral symmetry.

• They are triploblastic organisms.

• They are coelomate organisms.

• Echinoderms have a complete digestive system.

• They have a water vascular system that helps in locomotion,respiration,food capture etc.

• Reproduction is by sexual means with external fertilization.

• They have an indirect development with free - swimming larval stage.

• Some examples of echinoderm are Starfish,Brittle star ,Sea urchin etc.

Arthropod

• Arthropoda is the largest phylum of the animal kingdom.

• Over two - third of the animals known in the world are arthropods.

• They have organ - system level of organisation.

• Body is covered by chitinous exoskeleton.

• They have jointed legs.

• The circulatory system is open type.

• Various members have different respiratory organs.

• Excretion takes place with help of malpighian tubules.

• Have internal fertilization.

• They are oviparous and lays egg.

• Development may be direct or indirect.

• Examples- Spiders , Crabs , Honey bee , Locust , Scorpion , etc.