Independent - Review Concept 1.2 Classification of Life (Before you take this interactive, read Concept 1.2 in your booklet)

1. Why do you think biologists classify organisms into groups? 2. Which two organisms would you put in the same group and why? Frog, turtle, toad, bee eater bird, dog. 3. Which two organisms do you think belong to the same group (kingdom) and why? Mango tree, coyote, streptococcus bacterium, fern. 4. Choose the correct word from the word bank to complete the text. The Three Domains of LifeIn classifying life forms, many biologists call the broadest category a domain. According to this classification scheme, there are three domains: Archaea, Bacteria, and Eukarya. The organisms of domains Archaea and Bacteria are very tiny. Most of these organisms are unicellular, meaning that their entire bodies consist of just a single cell. These cells are relatively simple. For example, they lack nuclei—their DNA is not separated from the rest of the cell. These cells without nuclei are called prokaryotic cells. Though domains Bacteria and Archaea both consist of prokaryotic organisms, they are otherwise very different from each other, as you'll learn later on in your biology course.. 5. The two names that make the scientific name of an organism are genus and species kingdom and species species and genus 5. The main characteristic of eukaryotic cells is that they have A membrane A nucleus A cytoplasm 6. The biggest class of organisms scientists have classified are Reptiles Mammals Insects 7. Match each word to its definition Species A distinct form of life Domain The broadest category used to classify life forms Unicellular Consisting of a single cell Prokaryotic cell A cell lacking a nucleus and most other organelles Eukaryotic cell A cell with a nucleus and other internal organelles Multicellular Consisting of many cells 8. Complete the chart about the classification of a green iguana Species Genus Class Phylum Kingdom 9. Sort the names into their correct category Domain Archea Bacteria Eukarya Kingdom Plantae Animalia Protista Fungi 10. Read this text, then answer the questions below. Classifying Life: The Basic IdeaHumans have a tendency to place items in categories. For instance, perhaps you organize your music collection according to artist. And then maybe you group the various artists into even broader categories, such as study-time music, dance music, and exercise music. This behavior may explain why one of the oldest branches of biology is the study of classification—organizing similar species into larger groups. Grouping species probably seems natural to you. You may speak of butterflies, recognizing that there are many types (species) of butterflies. You may sort groups of animals into broader categories, such as the insect group (which includes groups such as ants and bees as well as butterflies). And you probably recognize that insects and reptiles, as different as they are, both belong to the larger animal group, which in turn is very different from the plant group. a. What is a natural human tendency? b. What shows that classifying organisms is an accepted idea? c. Why do we need to organize organisms into broader categories? d. Give examples of organisms that have to be classified into very different groups.