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Closest Human Relatives - Hard
Choose the organism most closely related to humans based on current phylogenetic classification. Answers are increasingly more distantly related.
Source: onezoom.org
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Last updated: February 23, 2026
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| First submitted | February 23, 2026 |
| Times taken | 6 |
| Average score | 50.0% | Report this quiz | Report |
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1. Our closest relative, diverging under 1 million years ago. Sometimes called a subspecies of Homo sapiens.
Neanderthals are so closely related that they interbred with other human species. Bonobos are apes, and the other two are early human species.
Austrolopithecus
Homo erectus
Neanderthal
Bonobo
2. Our closest nonhuman relative, diverging around 6 million years ago. We are both part of the Hominini tribe.
Chimps and bonobos are our closest animal relative, followed by gorillas. The other two are more distantly related monkeys.
Macaque
Spider monkey
Gorilla
Chimpanzee
3. Our fellow great apes, diverging around 14 million years. We are both part of the family Hominidae.
Orangutans are great apes, like gorillas, chimps, and bonobos. Baboons are monkeys, and the other two are more distantly related mammals.
Opossum
Orangutan
Baboon
Flying squirrel
4. Distantly related primates, diverging around 65 million years ago. We are both part of the order Primates.
Lemurs like King Julian are primates but not monkeys. Rabbits and chinchillas are related to primates, and kangaroos are marsupials.
Rabbit
Chinchilla
Kangaroo
Lemur
5. Our closer non-primate relatives, diverging around 75 million years ago. We are both part of the superorder Euarchontoglires.
Rodents like mice and rabbits diverged together with primates from most other mammals, including the other three here.
Bat
Dog
Mouse
Cow
6. More distantly related mammals, diverging around 90 million years ago. We are both part of the infraclass Placentalia.
Elephants diverged from other mammals earlier than most but not quite as early as monotremes like echidnas or marsupials like koalas and sugar gliders.
Sugar glider
Echidna
Koala
Elephant
7. The most distantly related mammals, diverging around 180 million years ago. We are both part of the class Mammalia.
Platypuses (Platypus? Platypi?), along with echidnas, are monotremes, the only mammals that lay eggs.
Platypus
Crocodile
Eagle
Whale shark
8. Our closer nonmammal relatives have similar embryo development to us, diverging around 320 million years ago. We are both part of the clade Amniota.
Birds and reptiles diverged together from mammals. Amphibians like frogs diverged just before.
Lungfish
Frog
Pigeon
Salamander
9. Our fellow vertebrates, diverging around 430 million years ago. We are both part of the phylum Chordata.
Stingrays are cartilaginous fish like sharks and are more distantly related to us than fish with true bones.
Octopus
Stingray
Earthworm
Sea urchin
10. Our most closely related animals outside of Chordata, diverging around 550 million years ago. We are both part of the superphylum Deuterostomia.
Surprisingly, starfish are somewhat closely related to vertebrates. We both have our anus form before our mouth as embryos.
Ladybug
Tardigrade
Starfish
Jellyfish
11. Bilaterally symmetrical animals, diverging around 560 million years ago. We are both part of the clade Bilateria.
Bilateral symmetry, a feature of most animals, developed after the radial symmetry of the other animals here.
Bumblebee
Sea nettle
Coral
Comb jelly
12. Some of the earliest animals, diverging around 650 million years ago. We are both part of the kingdom Animalia.
Sea sponges are likely the earliest forms of animals, although some evidence points to comb jellies diverging sooner.
Diatom
Mold
Sea Sponge
Green algae
13. Our closest relatives outside the animal kingdom, diverging around 1.35 billion years ago. We are both part of the clade Opisthokonta.
Mushrooms diverged from animals just after amoebae did and well later than the various algae and plants did.
Brain-eating amoeba
Oak tree
Mushroom
Red algae
14. Our distant eukaryote relatives, diverging around 2.15 billion years ago. We are both part of the domain Eukarya.
Eukaryotes like plants and animals come from an ancestral archaeon that evolved with a symbiotic bacterium inside of it, the only known example of this phenomenon.
Coronavirus
E. coli
Tulip
Staph. bacteria
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