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Question
Find more topics from your Environmental Studies or Mathematics textbooks for drawing tree diagrams. Draw and label the diagrams.
| Life on earth began with unicellular I organisms known as protozoa. The following are the stages of evolution of animals. Invertebrates are animals without a backbone, for e.g., a snail. The vertebrates are animals which have a backbone. E.g., Aquatic animals like fish. Animals which: live in water and also on land are called amphibians. E.g. A frog. A few invertebrates are worms and mosquitoes and a few I vertebrates are reptiles. |
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Solution
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