Question | Answer |
A living thing | organisms |
the basic unit of structure and function in living things | cell |
a type of organism that is made up of a single cell | unicellular |
a type of oraganism that is made up of many cells | multicellular |
the process of cahnge that occurs during an oraganisms life to produce a more complex organism | development |
a change in an organism's surroundings that causes the organism to react | stimulus |
in action of change in behavior that occurs as a result of a stimulus | response |
the production of offspring that are similar to the parents | reproduce |
the mistaken idea that living things arise from nonliving sources | spontaneous generation |
an experiment in which all of the variables except for one remian the same | controlled environment |
the one factor that a scientist changes to test a hypothisis during an experiment; also called the indenpendent variable | manipulated variable |
an organism that makes its own food | autotrophs |
an organism that cannot make his own food | heterotrophs |
the process by which an organisms internal environment is kept stable in spite of changes in the external environment | homeostasis |
an instrument that makes small objects look larger | microscope |
a light microscope that has more than one lense | compund microscope |
a widley accepted explanation of the relationship between cells and living things | cell theory |
the ability to make things look larger than they are | magnification |
the ability to clearly distinguish the individual parts of an object | resolution |
a rigid layer of non living material that surrounds the cells of plants and some other organisms | cell wall |
the outside boundary of a cell; controls which substance can enter or leave the cell | cell membrane |
the control center of a cell that directs the cells activities; contains the chemical instructions that direct all the cells activities an determine the cells charactercitis | nucelus |
material in cell that contains DNA and caries gentic information | chromatin |
the region of a cell located inside the cell membrane or between the cell membrane or between the cell membrane and nucelus; contains a gel-like material and cell organalles | cytoplasm |
rod-shaped cell structure that produce most of the energy headed to carry out the cells functions | mitochondria |
a cell structure that forms a maze of passageways in which proteins and other materials are carried from one part of the cell to another | endoplasmic reticulum (ER) |
a tiny structure in the cytoplasm of the cell were proteins are made | ribosomes |
a structure in a cell that receives proteins and other newly formed materials from the endoplasmic reticulum (ER), packages them, and distributes them to other parts of the cell | golgi bodies |
a structure in the cells of plants a some other organisms that capture energy from sunlight and uses it to produce food | chloroplasts |
a water-filled sac inside a cell that acts like a storage area | vacuole |
a small round cell structure that contains chemiclas that breakdown large food particals into smaller ones | lysosomes |
an organism whose cells lack a nucleus an some other cell structures | prokaryotes |
an organism wiht cells that contain nuclei and other cell structure | eukaryotes |
the preserve remains or traces of an organism that lived in the past | fossil |