Bio 198 Midterm Exam Questions and Correct Answers

What is life? organisms that 1. Require energy and raw materials, 2. Sense and respond to change, 3. Pass DNA to offspring, 4. Made of up cells What are the four major proterities of life? population, community, ecosystem, biosphere Describe the success levels of life organization. atom: unit of matter Molecule: atoms bonded together Cell: smallest unit of life Organism: individual made of cells Population: group of individuals of a species in an area Community: all the populations of an area Ecosystem: community interacting in its environment Biosphere: all regions of earth that hold life Distinguish producers from consumers producers: make energy Consumers: consume others for energy Describe how movement of nutrients and energy flow through an ecosystem. energy flows one way from environment, through organisms and back to environment Nutrients are recycled through the ecosystem Explain why homeostasis is is important for sustaining life. it regulates internal environment within a favorable range in response to external environment What is the purpose of DNA among living organisms? carries hereditary information that guides development/ controls inheritance Why are archaea given their own separate domain? the large differences in their ribosomal RNA structure Describe