The immune system
The immune system is the body's layered defense network, using barriers, cells, proteins, inflammation, targeted responses, and memory to recognize danger, fight infections, remove abnormal cells, and avoid damaging healthy tissue.
Category
Biology Topics
Browse Qlopedia topics grouped under Biology.
59 topics, showing 49-59 on page 3 of 3.
Topics
Horse
Horses are large one-toed mammals whose speed, strength, social behavior, and domestication reshaped transport, farming, warfare, sport, and human culture.
Hamster
Hamsters are small burrowing rodents known for internal cheek pouches, nocturnal activity, food hoarding, and several species kept as household pets.
Guinea Pig
Guinea pigs are domesticated South American rodents known for social vocal behavior, plant-based diets, continuously growing teeth, and a long history with Andean peoples and household care.
The Galapagos Islands
The Galapagos Islands are a volcanic archipelago of Ecuador in the eastern Pacific, famous for endemic wildlife, Charles Darwin's 1835 visit, and the way isolated islands reveal evolution, conservation challenges, and the fragility of living systems.
Elephant
Elephants are the largest living land animals, known for trunks, tusks, complex social lives, long memory, and powerful effects on the ecosystems and cultures around them.
Dolphin
Dolphins are toothed marine mammals known for streamlined bodies, social groups, complex communication, and echolocation that helps them hunt and move through the ocean.
Dog
Dogs are domesticated descendants of wolves whose biology, behavior, and social lives have been shaped by thousands of years living near people.
DNA replication
DNA replication is the cell process that copies genetic information before cell division, using each strand of the double helix as a template to build a new complementary strand with high accuracy.
Cat
Cats are small domesticated felines whose hunting instincts, flexible social behavior, and long relationship with people have made them one of the worldโ€s most familiar companion animals.
Bioluminescence
Bioluminescence is light made by living organisms through chemical reactions. It helps some animals find mates, attract prey, confuse predators, communicate in darkness, and reveal how chemistry, ecology, and evolution can turn energy into visible signals.