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| Linnaeus's system using two words |
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| the plant kingdom that obtains food by absorpstion and lacks chlorophyll |
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| members of the animal kingdom without backbones, such as arthropods and worms |
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| the class of vertebrates that possess mammary glands, have a body that is more or less covered with hair, and possess a well-developed brain |
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| the kingdom including the bacterial organisms that lack a true nucleus in the cell and reproduce by fission |
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| a flexible cord of cells in the embryo stage of growth that eventually becomes the vertebra |
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| mammals having a placenta through which the embryo and fetus are nourished while in the uterus |
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| animal kingdom including the single-celled or microscopic animals and single-celled algae |
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| the class that includes turtles, toroises, and related animals |
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| reptilia the class that includes turtles, toroises, and related animals |
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| the science that is concerned with the naming and classification of organisms |
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| the seven categories of linaeus's classification system |
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| adds a third word to linnaesus's system of classifying organisms |
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| animals that have a segmented spinal column |
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| The odest direct traces of life on earth date back _______________ years |
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| The first land plants were believed to have become established about 42o million years ago during the __________ period. |
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| Vertebrate animals, in the form of amphibians and reptiles, appeared during the _______ period. |
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| Dinosaurs appeared along with mammal-like reptiles during the ________ period. |
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| Dinosaurs reached their period of greatest abundance during the ________ period. |
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| Placental mammals evolved, dispersed, and adapted to new environments during the Paleocene and Eocene epochs ________ million years agoa |
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| An ancestor to modrn birds is _____________ |
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| the earliest indication of a domesticated animal dates back approximately ______ years |
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| ____ percent of all American families include at least one companion animal |
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| yearly expenditures for pet care in the US is placed at well over ___________ annually |
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| the US department of agriculture was given the power to control the use of dogs, cats, primates, guinea pigs, hamsters, and rabbits by the ______ ______ act |
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| _______ ________ is credited with developing our modern method of classifying organisms |
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| The naming of species is called binomial nomenclature and uses the _____ language |
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| name the five kingdoms in which all organisms are divided |
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| monera, protista, plantae, fungi, animalia |
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| what are the four distinctive characteristics of the phylum chordata? |
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| rear tail area, slitts for gills, embryonic notochord, dorsal tubular nerve cord running down back |
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| list, in order, the seven categories into which organisms are classified |
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| kingdom, phylum, class, order, family, genus, species |
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