Characteristics and classification of living organisms

1. The ability to detect or sense stimuli in the internal or external environment and to respond appropriately (11)
4. The taking in of materials for energy, growth and development. Plants require light, carbon dioxide, water and ions. Animals need organic compounds and ions and usually need water (9)
5. The process that make more of the same kind of organism (12)
6. A permanent increase in size and dry mass by an increase in cell number or cell size, or both (6)
9. An internationally agreed system in which the scientific name of an organism is made up of two parts: the genus and the species (8, 6)

2. The removal from organisms of the waste products of metabolism (chemical reactions in cells including respiration), toxic materials and substances that are in excess of requirements (9)
3. A group of organisms that can reproduce to produce fertile offspring (7)
7. An action by an organism or part of an organism causing a change of position or place (8)
8. The chemical reactions in cells that break down nutrient molecules and release energy for metabolism (11)

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