Biology Chapter 14-1

Biology Chapter 14-1 - Humans are vertebrates....

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Chapter 14 Section 1 - What is an Animal? What do you think of when you hear the word “animal”? You may think of a cat or dog.  Or maybe an elephant or giraffe. But would you think of a sponge? You may be surprised to learn that feather stars and corals are animals. Spiders, fish, and birds are animals also. Scientists have named more than one million species of animals. Some scientists think there are 2 million that have not been named. How many animals do scientists think live on the Earth today? 3 million There are two basic types of animals: vertebrates and invertebrates. Vertebrates an animal that has a backbone. Includes fishes, amphibians, reptiles, birds, and mammals.
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Unformatted text preview: Humans are vertebrates. Invertebrates These are animals without backbones. More than 95% of animals are these. Includes insects, snails, jellyfish, and worms. 1 5 Characteristics of All Animals 1. multicellular makeup- made of many cells- cells are eukaryotic- do not have cell walls 2. reproduction and development- almost reproduce sexually- egg and sperm form embryo- hydras reproduce asexually by budding 3. many specialized parts- organs, tissues, specialized cells 4. movement- used to search for food, shelter, or mates. 5. consuming- animals cannot make their own food- must be a consumer 2...
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Biology Chapter 14-1 - Humans are vertebrates....

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