| A | B |
|---|
| organism | a living thing |
| migrate | to move from one place to another |
| phylum | a main group within a kingdom, whose members share a common characteristic |
| kingdom | the largest and most general classification of living things |
| scientific name | the name for every living thing that combines the genus and species |
| vascular | containing plant tissue through which water moves up and food moves down |
| nonvascular | a division of plants that lack vascular tissue, including roots, stems, and leaves with veins |
| stem | a structure that holds a plant up and supports its leaves |
| root | a plant part that anchors a plant in the ground, stores food, and draws moisture and nutrients from the soil |
| photosynthesis | the process in which plants and some other organisms use sunlight to make food in the form of glucose |
| reproduction | the process that a living thing uses to produce more of its own kind. May be sexual or asexual |
| seed | a structure that contains a young, developing plant and stored food |
| sperm | a male sex cell |
| egg | the female sex cell |
| pollination | the transfer of pollen from an anther to the stigma |
| vertebrate | an animal with a segmented backbone |
| chordate | an animal with a nerve chord running down its back |
| endoskeleton | an inner supporting structure of bones |
| cartilage | a soft, bone-like material that is part of the endoskeleton of an animal |
| tetrapod | an animal with four legs or limbs, such as a turtle, salamander, or horse |
| invertebrate | an animal without a backbone |
| exoskeleton | a hard covering that protects an invertebrate's body |
| digestion | the process in which digested food is broken down into molecules that are usable by cells |
| excretion | the removal of wastes from the body |
| respiration | the process of releasing energy from food molecules such as glucose, which takes place in the mitochondria of a cell |
| diffusion | the movement of molecules from areas of higher concentration to areas of lower concentration |
| circulation | the movement of important materials such as oxygen, glucose, and wastes throughout the body |
| cold-blooded | a type of animal whose body temperature changes with the temperature of its surroundings |
| warm-blooded | the type of animal whose body temperature stays the same when the temperature of its surroundings changes |
| adaptation | a change in an organism that helps it survive or reproduce in its environment |
| tropism | the response of an organism toward or away from a stimulus |
| camouflage | an appearance that makes something look like its surroundings |
| mimcry | an adaptation in which an animal is protected against predators by its resemblance to a different animal |
| insulation | a material that does not conduct heat well. |
| instinct | an inherited behavior, one that is not learned but is done automatically |
| species | a group of similar organisms that reproduce more of their own kind |
