Animal Classification Quiz
Questions: 16 · 10 minutes
1. Researchers find an unfamiliar animal with a segmented body, a hard external skeleton, and jointed appendages. Which phylum should they examine first?
Annelida
Arthropoda
Echinodermata
Mollusca
2. A bat and a bird can both fly, but bats have hair and nurse their young, while birds have feathers. What is the best classification conclusion?
Both belong to Aves because both have wings
Both belong to Mammalia because both maintain a relatively stable internal body temperature
They belong to different classes because broader inherited traits and ancestry link bats with mammals and birds with other birds
They should be placed in the same order because flight is their most noticeable shared ability
3. An octopus has a soft body, a mantle, and a muscular foot modified into arms. To which phylum does it belong?
Arthropoda
Cnidaria
Mollusca
Echinodermata
4. An adult marine animal has five-part radial symmetry and moves using tube feet connected to a water vascular system. Which group is it in?
Cnidaria
Annelida
Echinodermata
Porifera
5. Which feature is distinctive to living birds?
Having forelimbs adapted as wings
Laying shelled eggs
Maintaining a relatively stable internal body temperature
Feathers
6. An animal has dry scales, breathes with lungs throughout its life, and lays amniotic eggs on land. Which class best fits it?
Amphibia
Reptilia
Chondrichthyes, the cartilaginous fishes
Mammalia
7. Which statement correctly interprets the scientific name Panthera leo?
Leo is the genus, and Panthera is the family
Panthera is the genus, and leo is the specific epithet
Panthera names the family, while leo names the genus
Panthera is the species, and leo is the order
8. A whale has fins and lives in water, but it breathes air with lungs and nurses its young. How should it be classified?
As a cartilaginous fish
As a mammal
As a bony fish
As an amphibian
9. A small land animal has eight legs, two main body regions, and no antennae. How should it be classified?
As an arachnid
As a crustacean
As an insect
As a centipede
10. When scientists compare two animals, which evidence most directly helps reveal inherited evolutionary relationships?
Whether the animals live in similar climates
Whether the animals are similar in body size
Similarities in DNA sequences inherited from common ancestors
Whether the animals eat similar foods
11. A marine vertebrate has gills, fins, and a skeleton made primarily of cartilage. Which group is the best match?
Cartilaginous fishes
Marine mammals
Bony fishes
Amphibians
12. Which sequence lists the main taxonomic ranks from broader to more specific?
Kingdom, phylum, order, class, family, species, genus
Kingdom, class, phylum, family, order, genus, species
Phylum, kingdom, class, order, genus, family, species
Kingdom, phylum, class, order, family, genus, species
13. An animal begins life in water with gills, then develops lungs while retaining moist, permeable skin. Which class best fits it?
Amphibia
Reptilia
Actinopterygii, the ray-finned fishes
Mammalia
14. A newly observed vertebrate has hair and produces milk for its young. Which class does it belong to?
Reptilia
Aves
Amphibia
Mammalia
15. An earthworm has a long, segmented body but lacks jointed legs and an exoskeleton. Which phylum contains it?
Annelida
Nematoda
Arthropoda
Mollusca
16. A marine animal has radial symmetry, tentacles, and specialized stinging cells used to capture prey. Which phylum best fits these clues?
Porifera
Mollusca
Echinodermata
Cnidaria