adaptation
A feature or behavior that helps a living thing survive in its environment
A camel's ability to store water is an adaptation to living in the desert.
bacteria
Very tiny living things made of a single cell that can be found everywhere and can cause illness
Washing your hands regularly helps remove harmful bacteria from your skin.
cell
The smallest basic unit of life that makes up all living things
A human body is made up of trillions of tiny cells.
dna
The molecule inside cells that carries the instructions for how a living thing looks and functions
Scientists used DNA to identify who committed the crime.
evolution
The slow process by which living things change over many generations to better survive in their environment
Evolution explains why modern birds developed from ancient dinosaurs over millions of years.
extinction
The state of a species no longer existing because all of its members have died
The extinction of the dinosaurs happened about 66 million years ago.
food chain
A series of living things where each one is eaten by the next one in the series
Grass, grasshoppers, frogs, and snakes are all part of the same food chain.
gene
A part of DNA that passes specific characteristics from parents to their children
She has a gene that gives her blue eyes, just like her father.
habitat
The natural environment where a plant or animal normally lives and grows
The rainforest is the natural habitat of many colorful birds.
nucleus
The central part of a cell that controls how the cell grows and works
The nucleus of the cell contains all the genetic information.
organ
A part of the body made of different tissues that works together to do a specific job
The heart is an organ that pumps blood through your body.
oxygen
A colorless gas in the air that all living things need to breathe and survive
Plants produce oxygen, which humans and animals need to breathe.
predator
An animal that hunts and eats other animals to survive
The lion is a powerful predator that hunts zebras on the grassland.
prey
An animal that is hunted and eaten by another animal
Small rabbits are common prey for foxes and eagles.
protein
A substance found in foods like meat, eggs, and beans that is essential for building and repairing body tissues
Eating enough protein every day helps your muscles grow strong.
reproduction
The process by which living things create new individuals of the same kind
Reproduction is essential for a species to survive and continue existing.
species
A group of living things that are similar and can reproduce with each other
The giant panda is an endangered species that lives in China.
tissue
A group of similar cells that work together to perform a specific function in the body
Muscle tissue helps your body move from place to place.
trait
A specific characteristic or feature of a living thing, often passed from parent to child
Eye color is a physical trait that you inherit from your parents.
virus
A very tiny particle that invades living cells and can cause disease in people, animals, or plants
The flu is caused by a virus that spreads easily from person to person.
Complete each sentence with the correct word from the word bank.
Match the vocabulary word with its correct definition.
| # | Ans. | Word | Definition |
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