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animals - Introduction to Animal Diversity The animal...

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Introduction to Animal Diversity! The animal kingdom is much more diverse than the plant kingdom.The things which seperate plants and animals are as follows 1. animals do not have cell walls. This means animals are free to move around. The most restricted in this classification is the phyla porifera because they seem to act like underwater trees planted in the ground and are basal animals. However,their cells do not consist of a cell wall,but structural protiens.Also animals have nervous and muscular tissue which is unique to them. 2.animals are heterotrophs. this is the big difference in plants and animals as plants make their own food by photosynthesis, animals have to create their own energy by ingesting it. 3. The fertilized zygote undergoes blastula formation. Although plants also reproduce sexually, their zygotes do not form a cleavage,which causes animals to undergo gastrulation and forms layers of embryonic tissue.
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