Science 7 · Unit 4: Grouping and identifying organisms · Cambridge Lower Secondary Science Stage 7

Questions

1. 1. What is a species?

   • a group of organisms that can breed together to produce fertile offspring
   • a group of organisms that look exactly the same
   • all the animals in one habitat
   • a group of plants and animals
   Check

2. 2. White rhinoceros and Indian rhinoceros belong to different species. What does this mean?

   • They eat different food.
   • They always fight each other.
   • They live in different countries.
   • They cannot breed with each other to produce fertile offspring.
   Check

3. 3. Do white rhinoceros and Indian rhinoceros look exactly the same?

   • No, they look different from one another.
   • Yes, they look exactly the same.
   Check

4. 4. How many horns does an Indian rhinoceros have?

   • one
   • none
   • three
   • two
   Check

5. 5. How many horns does a white rhinoceros have?

   • three
   • none
   • two
   • one
   Check

6. 6. A female horse breeds with a male donkey. What is the offspring called?

   • a pony
   • a zebra
   • a mule
   • a foal donkey
   Check

7. 7. Mules are big and strong. Which parent are they like in this way?

   • the horse
   • the donkey
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8. 8. Mules are quiet and easy to handle. Which parent are they like in this way?

   • the horse
   • the donkey
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9. 9. What does infertile mean?

   • very healthy
   • not able to move
   • very strong
   • not able to reproduce
   Check

10. 10. Which is a similarity between a horse and a donkey?

    • Both have very long ears.
    • Both have horns.
    • Both have feathers.
    • Both have four legs with hooves.
    Check

11. 11. Which is a difference between a donkey and a horse?

    • A donkey has no tail.
    • A donkey has longer ears.
    • A donkey has six legs.
    • A donkey has feathers.
    Check

12. 12. Which is evidence that horses and donkeys are different species?

    • Their offspring, mules, are infertile.
    • They can both carry people.
    • They both eat grass.
    • They both have four legs.
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13. 13. Mules are infertile. What does this tell us about horses and donkeys?

    • They are different species.
    • They are the same species.
    • Mules are a new species.
    • Horses are related to mules but not donkeys.
    Check

14. 14. Researchers found a tiny frog, about 16 mm long, in southwest India. Why did they think it might be a new species?

    • It was the biggest frog ever found.
    • It lived in the sea.
    • It looked different from the eight Microhyla species known in India.
    • It could fly.
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15. 15. The new frog might be rare. How many specimens should the researchers collect?

    • only a few, enough for evidence
    • as many as they can find
    • none at all
    • only one tadpole
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16. 16. Which evidence would best show whether the frog is a new species?

    • measure only how far it can jump
    • see whether it likes rocks
    • count how many eggs one frog lays
    • compare its features, call and DNA with known species
    Check

17. 17. The male frogs make a call like a cricket chirping. Why is the call useful evidence?

    • It shows how big the frog is.
    • All frogs have the same call.
    • Frogs of the same species recognise each other's calls when they breed.
    • It shows what the frog eats.
    Check