Vertebrate & Invertebrate | PDF - Free Printable

Problem Analysis:

The task involves identifying whether certain animals are vertebrates (animals with a backbone) or invertebrates (animals without a backbone). The worksheet provides examples of both vertebrates and invertebrates to help guide the answers. Additionally, there is a question about regenerative abilities.

Solution:

#### Step 1: Understand the Definitions
- Vertebrates: Animals that have a backbone (spinal column). Examples include mammals, birds, fish, reptiles, and amphibians.
- Invertebrates: Animals that do not have a backbone. Examples include insects, worms, snails, octopuses, and crabs.

#### Step 2: Answer Each Question

1. Birds are (vertebrates - invertebrates)
- Birds have a backbone, so they are vertebrates.
- Answer: Vertebrates

2. Fish are (vertebrates - invertebrates)
- Fish have a backbone, so they are vertebrates.
- Answer: Vertebrates

3. Insects are (vertebrates - invertebrates)
- Insects do not have a backbone, so they are invertebrates.
- Answer: Invertebrates

4. They can grow parts if they lose parts (worm - cows)
- Worms have regenerative abilities and can regrow lost parts. Cows, being vertebrates, do not have this ability.
- Answer: Worm

5. Crabs are (vertebrates - invertebrates)
- Crabs do not have a backbone, so they are invertebrates.
- Answer: Invertebrates

#### Final Answers:
1. Birds are vertebrates.
2. Fish are vertebrates.
3. Insects are invertebrates.
4. They can grow parts if they lose parts: worm.
5. Crabs are invertebrates.

Explanation:

- Birds and Fish: Both are classified as vertebrates because they possess a backbone.
- Insects and Crabs: These are invertebrates because they lack a backbone.
- Regeneration: Worms are known for their ability to regenerate lost body parts, which is not a characteristic of vertebrates like cows.

Final Answer Box:

\[
\boxed{
\begin{array}{l}
1. \text{Vertebrates} \\
2. \text{Vertebrates} \\
3. \text{Invertebrates} \\
4. \text{Worm} \\
5. \text{Invertebrates}
\end{array}
}
\]