Chapter 31 book notes

Chapter 31 book notes - Chapter 31 Overview of Animal...

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Chapter 31 Overview of Animal Diversity -locomotion is a distinctive characteristic of animals, although not all animals move about 31.1 Animals are multicellular heterotrophs without cell walls. Some General Features of Animals - Several characteristics among animals are considered important: o Animals are heterotrophs and must ingest plants, algae, or other animals for nourishment o All animals are multi-cellular, and unlike plants and protests, animal cells lack cell walls o Animals are able to move from place to place o Animals are very diverse in form and habitat o Most animals reproduce sexually o Animals have a characteristic pattern of embryonic development and possess unique tissues - herbivores consume autotophs, carnivores consumer heterotrophs, detritivores consume decomposing organisms - the animal kingdom includes about 35 phyla - the zygote first undergoes a series of mitotic divisions called cleavage - the cleavage becomes a solid ball of cells (morula) and then a hollow ball of cells (blastula) - zygote (cleavage) morula blastula blastospore gastrula - the cells of all animals except sponges are organized into structural and functional units called tissues (collections of cells that have joined together and are
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Chapter 31 book notes - Chapter 31 Overview of Animal...

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