"Biology 20 � Ecosystems worksheet"
Biology 20 – Ecosystems worksheet Modified True/False Determine if each statement is true or false. Please correct each false statement. 1. ______ A species is a group of organisms that are able to breed with one another and produce fertile offspring. 2. ______ Abiotic factors in a forest include levels of sunlight, moisture and oxygen levels in the atmosphere. 3. ______ Birds, insects, squirrels and pine trees in the boreal forest are an example of a population. 4. ______ Abiotic and biotic factors in a particular environment are called a community. 5. ______ An example of an ecosystem is lichens covering a boulder. 6. ______ The biosphere consists of all the ecosystems in the world and their interactions. 7. ______ Aristotle classified organisms into domains. 8. ______ The six kingdoms have been reorganized into three domains, which are a level above kingdom. 9. ______ Scientists today use the binomial nomenclature system devised by Linnaeus, which uses a three-part scientific name for an organism. 10. ______ A dichotomous key is a branched or stepped process that can be used to identify organisms. Multiple Choice (Select the best answer for each question below.) Use the following information to answer the next question. Organisms living in an ecosystem are influenced by both biotic and abiotic factors. Biotic factors result from the presence of other organisms in the ecosystem. Abiotic factors result from the nonliving components in the ecosystem. 1. Which row correctly matches an abiotic factor with its effect on an ecosystem? Row Abiotic factor Effect on the ecosystem A. Fire Seasonal changes B. Temperature Recycles nutrients C. Topography of land Affects the climate D. Latitude Changes density of water 2. Known organisms have been classified using a taxonomic system that begins with the broadest category and ends with the narrowest category. The ___i___ is the broadest category of classification, and the ___ii___ is the narrowest unit of classification. Row i ii A. domain species B. genus species C. species genus D. domain kingdom 3. Which of the following statements is incorrect about ecosystems? A. They consist of a community of populations. B. They include all the non-living factors of the environment as well as the living organisms. C. They are concerned with the interaction between the living and the non-living components. D. A pond is not an ecosystem because it is too small in area whereas a grassland is an ecosystem because it is large in area. 4. Which of the following groups of organisms contain cells with no membrane-bound nucleus? A. Bacteria and Fungi B. Archaea and Bacteria C. Bacteria and Protista D. Archaea and Fungi 5. Which of the following statements about binomial nomenclature is not correct? A. An organism’s scientific name is made up of two words. B. Based on the organism’s classification, the first word of an organism’s scientific name is its genus and the second word is its species. C. To make the system universal, scientists agreed to use a language that is not spoken by any country but that forms the basis of many languages. D. The species part of the name is always capitalized and the genus part is always in lowercase letters. 6. A group of wolves and a group of coyotes live in the same provincial park. Together, these organisms form A. a population B. a community C. an ecosystem D. none of the above Use the following information to answer the next question. Some of the taxa found in the biological classification system are given below. 1 genus 2 species 3 domain 4 kingdom Numerical Response 1. Using the numbers of the taxa listed above, match each group with the appropriate name used in the scientific classification of humans. Animalia _____ Eukarya _____ sapiens _____ Homo _____ (Record all four digits of your answer). Use the following information to answer the next question. A fallen tree is home to a number of organisms such as insects and small animals. Birds use the tree to make nests in holes or cavities. There is competition between different organisms to make this tree their home because the space available is limited. The fallen tree is also a source of food for some organisms. The small insects feeding on the tree are a source of food for the birds that nest in it. 7. Which of the following categories does a fallen tree belong to? A. Population B. Ecosystem C. Community D. Species 8. Today, there are three domains of life: Bacteria, Archaea, and Eukarya. These domains are based on the A. cellular composition of organisms B. evolution of organisms C. genetic composition of organisms D. physical composition of organisms