Biology Vocabulary Flashcards

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Organism

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Any living thing that can carry out life processes on its own. Example: A tiny bacterium and a giant redwood tree are both considered living organisms.

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Cell

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The basic structural and functional unit of all known living things. Example: Looking under a microscope, we can see the individual cells that make up a leaf.

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Reproduce

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To create new offspring, ensuring the continuation of a species. Example: Birds reproduce by laying eggs that eventually hatch into baby birds.

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Grow

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To increase in size or complexity over a period of time. Example: A small seed will grow into a mature plant if it gets enough sunlight and water.

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Metabolism

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The chemical processes in an organism that maintain life. Example: Digesting food and using its energy is part of an animal's metabolism.

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Respond

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To react to changes or signals in the surrounding environment. Example: When a bright light shines in your eyes, your pupils will automatically respond by getting smaller.

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Adapt

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To change over time in ways that increase survival in an environment. Example: Cacti adapt to dry desert conditions by storing water in their stems.

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Homeostasis

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The ability of an organism to maintain a stable internal condition. Example: Our bodies maintain homeostasis by sweating when we get too hot.

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Stimulus

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Something that causes a response in an organism or part of it. Example: The smell of food can act as a stimulus, making you feel hungry.

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Nutrient

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A substance that provides nourishment essential for growth and life. Example: Plants absorb nutrients from the soil through their roots.