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36 Cards in this Set
- Front
- Back
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herd immunity
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when most people in a community (herd) have been vaccinated, disease has a harder time spreading from individual to individual
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science
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the study of the natural world, which includes all matter and all energy
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biology
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the study of living organisms and life's processes- the study of life
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living things have a different molecular...
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composition than non-living things
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the molecules (of life) that are found in all living organisms (4)
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proteins, carbohydrates, lipids, and nucleic acids
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living things require..
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energy and raw materials
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metabolism
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the physical and chemical processes involved in transforming energy and molecules so that life can be maintained
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all living things take in raw materials and energy from the environment and does what....
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metabolizes them into the molecules and energy that they need to survive
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living things are composed of....
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cells
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a cell is....
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the smallest unit that exhibits all the characteristics of life
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all cells origiate from..
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existing cells
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unicellular organisms
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organisms that are only one cell
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multicellular organisms
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organisms that are composed of many cells or many different types of cells
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living things maintain...
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homeostasis
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homeostasis
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the maintenance of a relatively constant internal environment
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living things respond to....
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their external environment
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living things grow and...
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reproduce
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the ability to grow and reproduce is determined by....
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the genetic material in cells, called deoxyribonucleic acid (DNA)
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populations of living things...
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evolve
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what explains why there are so many different forms of life on earth today
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evolution
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the categories of the classification system are (from largest to smallest) are.... (8)
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1. domain 2. kingdom 3. phylum 4. order 5. class 6. family 7. genus 8. species
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prokaryotes
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cells without nuclei
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eukaryotes
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organisms whose cells have nuclei
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organisms in the domains Bacteria and Archaea are all...
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single-celled bacteria without nuclei
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all organisms whose cells have nuclei belong to the domain....
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Eukarya
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Eukarya is divided into what four kingdoms
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1. protista 2. animalia 3. fungi 4. Plantae
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the protista kingdom
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consists of unicellular and relatively simple multicellular eukaryotes such as protozoa, algae and slime molds
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what kingdom consists of animals
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animalia kingdom
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what kingdom consists of fungi
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the fungi kingdom
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what kingdom consists of plants
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the plantae kingdom
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how is the hierarchy of life organized (11)
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1. atoms 2. molecules 3. organelles 4. cells 5. tissues 6. organs 7. organ systems 8. organisms 9. populations 10. communities 11. biosphere
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what are the characteristics of life (6)
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1. reproduction 2. growth/change 3. energy utilization 4. organized 5. irritability 6. composed of cells
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how do we study life
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the scientific method
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the scientific method is a formal method of...
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obtaining answers to questions about the natural world
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what is a hypothesis and how is it tested
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it is a tentative statement about the natural world (proposed answer)- tested by experimentation
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what is an experiment
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a carefully planned and executed manipulation of the natural world to test your prediction
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