| A | B |
|---|
| organ | a combination of two or more tissues that work together to perform a specific function in the body. |
| tissue | a group of similar cells that work together to perform a specific job in the body. |
| organelle | a structure within a cell, sometimes surrounded by a membrane. |
| mitosis | nuclear division in eukaryotic cells in which each cell receives a copy of the original chromosomes. |
| diffusion | the movement of particles from an area where their concentration is high to an area where their concentration is low. |
| chlorophyll | a green pigment in chloroplasts that absorbs light energy for photosynthesis. |
| chloroplast | an organelle found in plant and algae cells where photosynthesis occurs. |
| warm blooded | the ability of an organism (animal) to regulate its own body temperature at a constant temperature. |
| cold blooded | the inability of an organism to regulate its own steady body temperature; cold blooded animals have the same body temperature as its surroundings. |
| cell | the basic biological unit of life |
| stimulus | any action or condition in our surroundings that result in some kind of response. |
| response | some action or condition that occurs or changes following some kind of stimulus. |
| sexual reproduction | reproduction within a species involving both male and female members of the species |
| asexual reproduction | reproduction within a species involving only one member of the species |
| spontaneous generation | the idea that life can suddenly arise from nonliving things |
| metabolic activities | the biochemical activities that occur within the body to keep us alive |
| homeostasis | the ability of an organism or a cell to regulate its internal conditions |
| organ system | a group of organs working together to accomplish necessary life processes |
| bioaccumulation | the accumulation of toxins in living things, as in living things that follow a food chain |
| glucose | C6H12O6 food in the form of glucose sugar formed during photosynthesis |
| photosynthesis | the process by which plants use sunlight, water, and carbon dioxide to form glucose and oxygen |
| mitochondria | a cell organelle that breaks down food molecules to make ATP |
| cellular respiration | the process by which living things obtain energy by food; the reverse of photosynthesis |
| fermentation | a kind of cellular respiration which does not use oxygen to break down food into energy |
