Pupil sheet · Living things and keys
Living things and keys — return questions
Name ______________________ Date ____________
Use one to two weeks after the lessons. Keep the notes and the lesson closed.
1. identify
Which is the correct description of growth?
Circle one answer.
- A permanent increase in size and dry mass
- Any increase in mass
- An increase in size from taking in water
- Making more organisms of the same kind
2. complete
Complete the sentences.
Respiration is the chemical reactions in … that break down nutrient molecules
… and release …
Excretion is the removal of the waste products of …
Passing out faeces, which are mostly undigested food, is called …
3. describe
Describe what is meant by (a) movement, (b) reproduction and (c) nutrition in living organisms.
(a) Movement
(b) Reproduction
(c) Nutrition
4. state
What does "dichotomous" mean in a dichotomous key?
Circle one answer.
- Using pictures
- Dividing into two at each step
- Using scientific names
- Starting with the biggest organism
5. construct
Write a pair of opposite statements that would separate a holly leaf from a beech leaf. (A beech leaf is one blade with a smooth, wavy edge.)
6. identify
Use the six-tree key. A leaf is divided into leaflets that grow in pairs along the stalk, with one leaflet at the tip. Which pairs of the key does it pass through, and what is it?
| Pair | Statement | Go to |
|---|---|---|
| 1 | Leaf divided into separate leaflets | 2 |
| Leaf is one blade | 3 | |
| 2 | Leaflets spread from one point at the end of the stalk | horse chestnut |
| Leaflets in pairs along the stalk, with one at the tip | ash | |
| 3 | Sharp spines on the edge of the leaf | holly |
| No spines on the edge | 4 | |
| 4 | Lobes along both sides of the midrib | oak |
| Lobes spreading from one point | 5 | |
| 5 | Lobes with small teeth on the edge | sycamore |
| Lobes with a smooth edge | field maple |
Circle one answer.
- 1 → 3 → 4: oak
- 1 → 2: horse chestnut
- 1 → 2: ash
- 1 → 3: holly
7. identify
In the binomial system, what does the first part of a scientific name show?
Circle one answer.
- The genus
- The species
- Where the organism lives
- The kingdom
8. deduce
Supplement. Two species have DNA base sequences that are very similar. What does this suggest?
Circle one answer.
- They live in the same place
- They share a recent common ancestor
- They are the same species
- They have the same common name
9. identify
Biologists put the lion, the tiger and the leopard in one group, and the sycamore and the field maple in another. How do biologists decide which organisms go in the same group?
Circle one answer.
- By where they live
- By the features they share
- By their size
- By their common names
10. identify
A horse and a donkey have young called mules, which are infertile. A zebra and a horse can have young called zorses, which are also infertile. A Chihuahua and a Great Dane have puppies that grow up and have puppies of their own. A cat and a dog cannot have young together. Which pair of animals belongs to one species?
Circle one answer.
- A horse and a donkey
- A zebra and a horse
- A Chihuahua and a Great Dane
- A cat and a dog