Question

D. Answer the following in one word each. 1. Animals that have a backbone 2. Animals that do not have a backbone 3. Number of bones that make up a human skeleton​

Answer 1

Answer:

1. Fish

2. Sponges

3. 206 bones

Explanation:

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Answer 2

Sponges, corals, worms, insects, spiders and crabs are all sub-groups of the invertebrate group - they do not have a backbone.

Fish, reptiles, birds, amphibians and mammals are different sub-groups of vertebrates - they all have internal skeletons and backbones.

The adult human body has 206 bones.