Name: How Are Dichotomous Keys Used?
Uploaded: 2019-07-19
Duration: 2 min 47 s
Description: How do you think biologists identify and classify unknown organisms? They do this using a tool known as the dichotomous key. Watch this video to learn how.

Question

Give an account on the classification of invertebrates with few general features and examples.

Accepted Answer

Invertebrates are animals that do not possess vertebral column or notochord. These include all animals apart from the subphylum Vertebrata. There are mainly four kinds of invertebrates as listed below by Phylum.

Phylum Mollusca:

These animals do not have the segmented body, unlike arthropods. Mollusca skin consists of a mantle that releases a shell. Their skin is soft and mostly found in seawater and fresh water. Examples of Mollusca are Octopus, Snail, and Oyster.

Phylum Annelida:

The group of Annelids has many worms. Their bodies are segmented and consist of 3 layers and hence are called Triploblastic animals. Examples of Annelida involve earthworm, sandworm, and leech.

Phylum Arthropods:
Arthropods are animals that do not have a segmented body. Their bodies are bilaterally symmetrical with a strong exoskeleton. Arthropods are capable of adapting to different environments quickly. Examples of Arthropods are scorpions, honey bees, and spiders.

Phylum Coelenterata:
The bodies of Coelenterates are radially symmetrical. These animals are diploblastic which means that their bodies comprise two layers known as endoderm and ectoderm. Examples of Coelenterates are hydra, jellyfish, and coral.

Give an account on the classification of invertebrates with few general features and examples.

Important Questions on Basis of Classification

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