Classification of living things

Vertebrates, invertebrates, animal and plant groups, and microorganisms

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1
Match each class of vertebrate to its key feature. Match each item on the left to one on the right. Left: Mammals, Birds, Reptiles, Amphibians Right: Have hair/fur and feed young milk, Have feathers and lay hard-shelled eggs, Have dry scales and lay soft-shelled eggs on land, Have moist skin and lay eggs in water
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2
What is the main difference between vertebrates and invertebrates? A) Vertebrates have a backbone; invertebrates do not B) Vertebrates live on land; invertebrates live in water C) Vertebrates are large; invertebrates are small D) Vertebrates eat meat; invertebrates eat plants
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3
True or false? A whale is a fish because it lives in the sea. A) True B) False
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4
Which of these is a microorganism? A) Bacteria B) Ant C) Moss D) Fern spore
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5
Arrange these classification groups from largest (most general) to smallest (most specific). Put these in order: Species, Kingdom, Class, Phylum, Order
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6
Sort these animals into their correct groups: first list the mammals, then the reptiles. Put these in order: Crocodile, Bat, Lizard, Dolphin
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7
Match each organism to its kingdom. Match each item on the left to one on the right. Left: Oak tree, Mushroom, E. coli, Eagle Right: Plant, Fungus, Bacteria, Animal
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8
A newly discovered animal has six legs, three body sections, and an exoskeleton. How would you classify it? A) Insect B) Arachnid C) Crustacean D) Mammal
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9
True or false? Scientists sometimes change how organisms are classified when new evidence (such as DNA analysis) is discovered. A) True B) False
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10
True or false? Penguins are birds even though they cannot fly. A) True B) False
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Answer key

Classification of living things · for parents and teachers

1
Mammals → Have hair/fur and feed young milk; Birds → Have feathers and lay hard-shelled eggs; Reptiles → Have dry scales and lay soft-shelled eggs on land; Amphibians → Have moist skin and lay eggs in water
Each vertebrate class has unique characteristics: mammals (fur, milk), birds (feathers, hard eggs), reptiles (scales, land eggs), amphibians (moist skin, water eggs).
2
Vertebrates have a backbone; invertebrates do not
The key distinction is the presence of a backbone (spinal column). Vertebrates (fish, amphibians, reptiles, birds, mammals) have one; invertebrates (insects, spiders, worms, jellyfish) do not.
3
False
Whales are mammals, not fish. They breathe air with lungs, give birth to live young, feed babies milk, and are warm-blooded - all mammal characteristics despite living in water.
4
Bacteria
Bacteria are microorganisms - tiny living things too small to see with the naked eye. Ants are small but visible, and moss and fern spores are parts of larger plants.
5
Kingdom, Phylum, Class, Order, Species
Classification goes from broad to specific: Kingdom (e.g. animals) - Phylum (e.g. vertebrates) - Class (e.g. mammals) - Order (e.g. primates) - Species (e.g. humans).
6
Bat, Dolphin, Crocodile, Lizard
Mammals first: bat (has fur, feeds young milk) and dolphin (breathes air, warm-blooded, feeds young milk). Then reptiles: crocodile and lizard (both have dry scales, cold-blooded).
7
Oak tree → Plant; Mushroom → Fungus; E. coli → Bacteria; Eagle → Animal
Living things are classified into kingdoms: animals (move, eat food), plants (photosynthesise), fungi (decompose, absorb nutrients), and bacteria (single-celled, microscopic).
8
Insect
Six legs and three body sections (head, thorax, abdomen) with an exoskeleton are the defining features of insects. Arachnids have 8 legs, crustaceans usually have 10 or more.
9
True
Classification is updated as new evidence emerges. DNA analysis has shown that some organisms previously grouped together by appearance are actually not closely related, and vice versa.
10
True
True. Penguins have feathers and lay eggs, so they are birds even though they cannot fly.