bacteria a kingdom that includes unicellular organisms. They are the smallest and simplest of all living things. carnivore animals that eat other animals. cell the tiny, basic unit of life. cell membrane a thin and permeable layer that separates the inside of a cell from the outside. chloroplast an organelle in a plant cell that contains chlorophyll to carry out photosynthesis. cytoplasm the liquid that makes up most of the cell. This is mainly water. fungi a kingdom that includes unicellular or multicellular organisms that take in food and cannot move. herbivore animals that eat plants. movement a change of position. A movement can be a response to a stimuli. multicellular made up of more than one cell. nucleus the part of the cell that controls what happens in the cell. nutrition the process through which living things get raw materials and energy from food. omnivore animals that eat both plants and other animals. organ a group of tissues that work together to perform a common function. organelle the part of a cell that carries out a particular function. organism a complete living thing, made up of all the systems. oviparous animals that lay eggs. photosynthesis the process through which plants make their own food. They use energy from sunlight. protoctist a kingdom that includes protozoa and algae. reproduction the process through which living things produce offspring. sensitivity the process through which living things detect and respond to changes in their environment. system several organs that work together to perform a common function. tissue a group of similar cells with the same function. unicellular made up of just one cell. viviparous animals that give birth to live young. K E Y VO C A B U L A RY · We look after living things WRITE out a definition on a strip of paper. Your partner reads it and guesses the word. Take turns to write and guess. 1 154 · o n e h u n d r e d a n d f i f t y - f o u r
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