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CH 1 Vocab

TermDefinition
Biology Study of life
Organization Atom, Molecule, Organelle, Cell, Tissue, Organ, Organ System. The high degree of order within an organism's internal and external parts
Cell Smallest unit that can perform all life's processes
Unicellular Made up of one cell (bacteria)
Multicellular Made up of multiple cells (humans/trees)
Organs Structures that carry out specialized jobs within an organ system
Tissues Groups of cells that have similar abilities and that allow the organ to function
Organelles Tiny structures that carry out functions necessary for the cell to stay alive
Biological Molecules Chemicals compounds that provide physical structure and that bring about movement, energy use, and other cellular functions
Homeostasis The maintenance of a stable level of internal conditions even though environmental conditions are constantly changing
Metabolism The sum of all the chemical reactions that take in and transform energy and materials from the environment
Cell Division The formation of two new cells from an existing cell
Development The process by which an organism becomes a mature adult
Reproduction Essential for continuation of species. Where organisms produce new organisms like themselves
Gene A short segment of DNA that contains the instructions for a single trait of an organism
Domains Bacteria, Archaea, and Eukarya
Kingdoms Eukarya-animal, plant, fungus, protist / Archaea / Bacteria
Ecology The branch of biology that studies organisms interacting with each other and the enviroment
Ecosystems Communities of living species and their physical environment
Evolution Descent with modification
Natural Selection Theory which organisms that have certain favorable traits are better able to survive and reproduce successfully than organisms that lack these traits
Adaptions Traits that improve an individuals ability to survive and reproduce
Observation The act of perceiving a natural occurrence that causes someone to pose a question
Hypothesis A proposed explanation for the way a particular aspect the natural world functions
Prediction Forecasts what would happen in a test situation
Experiment Used to test a hypothesis and its predictions
Control Group Provides a normal standard against which the biologist can compare results of the experimental group
Experimental Group Identical to the control group except for the IV
IV The experimenter manipulates it, affect the DV
DV Responding variable, affected by the IV
Theory When a set of related hypothesis is confirmed to true of many times and can explain a great amount of data
Peer Review Where scientists read and critique a research paper
Compound Light Microscope Microscope that shines light through a specimen and has two lenses to magnify an image
Eyepiece Magnifies image (10x)
Obj. Lens Enlarges the image
Stage Supports a slide holding a specimen
Light source Provides light for viewing an image
Magnification The increase of an objects apparent size
Nosepiece Structure that holds the set of obj. lens
SEM Passes beams over surface of specimen. 3 dimensional images (100,000x)
TEM Transmits a beam of electrons through a very thinly sliced specime (200,00x)
Metric System Standard system of measurement
Base Units Describe length, mass, time, and other quantities
Created by: 15022