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Animalia is the largest of the five kingdom system, with over one million species. It has an extreme variety of shapes, colors, and sizes. It is made up of eukaryotic, multicellular, heterotrophic organisms that are either aquatic or terrestrial and reproduce sexually or asexually.
Invertebrates are a type of animal that have no backbone. They make up for about 97% of the animal kingdom. Some invertebrates are earthworms, butterflies, jellyfish, and giant squid. There are two kinds of invertebrates, lower and higher. Lower invertebrates are further behind in evolution, they are very soft and squishy and more vulnerable to predators. Higher invertebrates are further along in evolution, they are tougher and can be considered less vulnerable.
- Effects of Foreign Species Introduction on an Ecosystem
- The Results of the Introduction of the Commercial Fur Trade into Canada
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