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21 Cards in this Set
- Front
- Back
Homeostasis |
Maintenance of internal conditions regardless of external environment. A state of overall internal chemical and physical stability that is required for survival of cells and the body as a whole. |
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DNA |
Genetic blueprint. Deoxyribonucleic Acid. For all cells (and many viruses), the molecule of inheritance. A category of nucleic acids, each usually consisting of two nucleotide strands twisted together helically and held together by hydrogen bonds. The nucleotide sequence encodes the instructions for assembling proteins, and ultimately, a new individual. |
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RNA |
Carries out the instructions. Ribonucleic acid. A category of single-stranded nucleic acids that function in processes by which genetic instructions are used to build proteins. |
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Metabolism |
All chemical reactions in a living organism. All controlled, enzyme-driven chemical reactions by which cells acquire and use energy. Through these reactions, cells synthesize, store, break apart, and eliminate substances in ways that contribute to growth, survival, and reproduction. |
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Catabolism |
Break down of substances. Metabolic activity that breaks down large molecules into simpler ones, releasing the components for use by cells. |
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Anabolism |
Build up of substances. Metabolic activity that assembles small molecules into more complex molecules that store energy. |
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Ecological Pyramid |
A way to represent the energy relationships of an ecosystem. |
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Atom |
The smallest unit of matter that is unique to a particular element. |
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Molecules |
A unit of matter in which chemical bonding holds together two or more atoms of the same or different elements. |
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Organelles |
In cells, an internal, membrane-bounded sac or compartment that has a specific, metabolic function. |
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Cell |
First level that is living. The smallest living unit, an organized unit that can survive and reproduce on its own, given DNA instructions and suitable environmental conditions, including appropriate sources of energy and raw materials. |
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Tissue |
A group of cells and intercellular substances that function together in one or more specialized tasks. |
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Organ |
A body structure of definite form and function that is composed of more than one tissue. |
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Organ System |
Two or more organs that interact chemically, physically, or both in performing a common task. |
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Organism |
Any contiguous living system, such as an animal, plant, fungus, archaeon, or bacterium. All known types of organisms are capable of some degree of response to stimuli, reproduction, growth and development and homeostasis.
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Population |
A group of individuals of the same species occupying a given area. |
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Community |
The populations of all species occupying a habitat; also applied to groups of organisms with similar lifestyles in a habitat. |
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Ecosystem |
An array of organisms and their physical environment, all of which interact through a flow of energy and a cycling of materials. |
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Biome Biosphere |
A broad, vegetational subdivision if a biogeographic realm shaped by climate, topography, and composition of regional soils. All regions of Earth's waters, crust, and atmosphere in which organisms live. |
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Scientific method |
A systematic way of gathering knowledge about the natural world. |
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What are the 4 steps in the Scientific Method? |
1. Observe 2. Hypothesis 3. Test/experiment 4. Conclude |