Explore the living world with biology trivia covering genetics and DNA, human evolution, ecology, microbiology, and marine biology. From the double helix to forensic science and the fungi quietly running the planet, life is stranger and more wonderful than fiction. Look through the microscope and see if your biology knowledge evolves past the competition.

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These organelles, once free-living bacteria that were engulfed by early eukaryotes, now produce most of a cell's ATP through oxidative phosphorylation.
This English naturalist sailed on HMS Beagle and later proposed that species change over time through a process he called "descent with modification."
These organisms thrive in environments that would kill most other life forms, such as boiling hot springs or freezing Antarctic ice.
This unique pattern found on every person's fingertips has been used to identify criminals since the late 1800s.
These are the four chemical bases that make up the letters of the genetic code in DNA.
These intelligent marine mammals are known for their playful behavior, echolocation abilities, and living in social groups called pods.
This familiar pizza topping is cultivated worldwide and is the most commonly eaten mushroom on Earth.
This Ethiopian site yielded both the famous 3.2-million-year-old "Lucy" skeleton and stone tools dating back 2.5 million years.