biodiversity - the variety of different plant and animal species in an environment
The scientist studied the biodiversity of animals living in the rainforest.
biologist - a scientist who studies living organisms, from tiny cells to large ecosystems, to understand how life works
A marine biologist explained how the coral reefs are dying.
biology - the scientific study of life and living organisms
The biology class learned how plants use sunlight to grow.
symbiosis - a close, long-term relationship between two different kinds of living things
The clownfish and the sea anemone share a symbiosis because they protect and help each other live.
biography - a written account of a real person's life written by someone else
We read a biography about a famous scientist and learned about her life.
antibiotic - a medicine that destroys or slows down the growth of harmful bacteria
Michael had to take antibiotics in order to cure his illness.
biological - relating to life, living organisms, or the natural processes of living things
We learned about the biological needs of a caterpillar, like eating leaves and making a cocoon.
biofuel - a special kind of energy made from living or recently living plants and animal waste instead of ancient fossils
Some cars can run on biofuel made from corn and sugarcane instead of regular gas.
autobiography - a self-written account of a person's own life story
Charlotte wrote an autobiography to tell her own life story.
biosphere - the part of Earth where all life exists, forming a giant "life zone" that includes every animal, plant, and tiny microbe
Earth's biosphere is made up of all living things, working together with the air, water, and land.
abiotic - non-living physical and chemical parts of an environment
A rock is an abiotic object because it does not breathe, grow, or eat.
bioluminescence - the production and emission of light by a living organism (like fireflies)
Some animals glow because they have a special ability called bioluminescence.
biometrics - using unique parts of your body or special ways you act to prove who you are
My dad used biometrics by pressing his thumb on the phone to unlock it.
biodegradable - capable of being broken down naturally by bacteria or other living organisms
We avoid using foam plates because they aren't biodegradable and will remain at the dump for hundreds of years.
biome - a very large community of plants and animals that lives in a specific region defined by its unique climate, soil, and weather
Only animals that are able to endure the blazing sun and extreme heat with little water can survive in the harsh desert biome.
biohazard - a biological substance—such as a virus, bacterium, toxin, or medical waste—that poses a threat to human health or the environment
We saw a bright orange biohazard symbol on the door of the hospital laboratory.