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Science Mid-Term
| Question | Answer |
|---|---|
| sexual reproduction | requires two parents |
| asexual reproduction | requires one parent |
| metabolism | all chemical activities that an organism's cell performs |
| homeostasis | ability of an organism to keep proper temperature |
| producer | an organism that that makes its own food; plants utilize chloroplasts |
| consumer | obtains food by eating other organisms |
| heredity | can cause offspring to resemble their parents |
| Stimuli | a change in an organism's enviroment that effects its activities |
| diffusion | particles move from areas of high concentration to areas of low concentration |
| active transport | nutrients move through a membrane using energy |
| osmosis | diffusion of water through a cell membrane |
| cells | basic units of living things |
| stimulus | a change in an organisms enviroment that effects its activities |
| organs | groups of tissues working together; example heart |
| characteristics of living things | 1. made of cells 2. ingestion 3. digestion 4.respiration 5. excretion 6.growth 7.respond to simuli 8. reproduction |
| mitosis | creates two identical cells |
| response | an organisms response to simuli |
| controlled experiment | tests only one factor (thing) at a time |
| scientific method | series of steps used to answer questions and solve problems |
| hypothesis | a possible explanation or answer to a scientific question |
| conclusion | summary of completed controlled experiment |
| cell wall | protects and supports the plant cell |
| cell membrane | controls what goes in and out of the cell |
| organs | two or more tissues working together; heart; liver; lungs |
| DNA | molecule that carries our hereditary information |
| lysosomes | contains digestive enzymes |
| vacuoles | storage tanks in a cell |
| respiration | oxygen is used to break down food and release energy |
| endopolasmic reticulum | transports proteins throughout the cell |
| ribosomes | make proteins for the cell |
| mitochondria | powerhouse of the cell |
| chromosomes | direct cell growth and reproduction |
| chloroplasts | makes food for plants inside their cells |
| nucleus | control center of the cell |