General Biology: Exam 1 Questions And Answers Rated A+ New Update Assured Satisfaction

Atom - Fundamental building block of all matter Molecule - Two or more atoms Cell - Basic form of life; smallest unit of life Organ - A grouping of tissues engaged in a collective task Tissue - Specialized cells organized in a pattern Organelle - Structure that carries out a specialized metabolic function within a living cell Organ System - A set of organs engaged in a collective task that keeps the body functioning properly Organism - Individual that consists of of one or more cells Population - Grouping of the same species Community - All populations of all species in a given area; looks at interaction between the species Ecosystem - All biotic and abiotic things; a community interacting with its environment Biosphere - All ecosystems on the planet*Gaia Theory: planet is one big organism Characteristics of Life - All living things: 1) Are made up of cells * 2) Have different levels of organization 3) Obtain and convert energy from environment * 4) Respond to their environment * 5) Get larger and more complex throughout life 6) Reproduce * 7) Adapt to their environment; Homeostasis * Carbohydrates - 1:2:1 CH2O - Monosaccharides: simple sugars (glucose) - Oligosaccharides: few sugars (sucrose) - Polysaccharides: complex carbs; storage & structure (starch) *Biologically important molecule Proteins - Composed of amino acid monomers - Complex - 3D enzymes - Diverse *Biologically important molecule Lipids - Non polar; doesn't dissolve in H2O - Triglycerides: monomers of fatty acids & glycerol - Phospholipids: bipolar molecule- Steroids: 4 carbon rings *Biologically important molecule Nucleotides - Monomer of nucleic acids; Has a five-carbon sugar, a nitrogen-containing base, and phosphate groups *Biologically important molecule Producers - Autotrophs: organism that makes its own food Consumers - Heterotrophs: organism that gets energy and nutrients from by feeding on other organisms Hypothesis - Clear, short statement that answers question and can be tested Prediction - "If..Then.." statement based on hypothesis