1. Gap between the big and small containers.
Quick Question
What is wrong with this pitfall trap?
No lid!
Gap between the big and small containers.

2. By the end of the lesson you will be able to …..
National
5 outcomes
By the end of the lesson you will be able to …..
Use and construct biological keys

3. Biological Keys
In order to identify and name a living organism, we use a biological key. There are two types of key:
Branched Key
Paired Statements Key

4. Classifying Mr Men

5. What characteristic splits the group in half?
Meet the Mr Men
What characteristic splits the group in half?

6. 1) Does he have a hat?
Yes No

7. Mr Men with Hats
2) Is he round?
Yes No

8. Mr Men without Hats
2)Does he have hair?
Yes No

9. Mr Men with Hats who are round
3)Is his hat red?
Yes No

10. Mr Men with hats who aren’t round
3)Is he smiling
Yes No

11. Mr Men without hats who have hair
3)Is his hair neat and tidy?
Yes No

12. Mr Men without hats and hair
3) Is he wearing shoes?
Yes No

13. Mr Clumsy His Characteristics He doesn’t have a hat He has hair
His hair isn’t neat and tidy
Back to the start

14. Mr Forgetful His Characteristics He does have a hat He is round
His hat is red
Back to the start

15. Mr Fussy His Characteristics He doesn’t have a hat He has hair
His hair is neat and tidy
Back to the start

16. Mr Grumpy His Characteristics He does have a hat He isn’t round
He isn’t smiling
Back to the start

17. Mr Happy His Characteristics He doesn’t have a hat
He doesn’t have hair
He isn’t wearing shoes
Back to the start

18. Mr Impossible His Characteristics He does have a hat He is round
His hat isn’t red
Back to the start

19. Mr Noisy His Characteristics He doesn’t have a hat
He doesn’t have hair
He is wearing shoes
Back to the start

20. Mr Strong His Characteristics He does have a hat He isn’t round
He is smiling
Back to the start

21. Start No Hat Hat Hair No Hair Not Round Round Hair tidy Hair not tidy
Not Smiling
No Red Hat
Red Hat
Shoes
No Shoes
Smiling
Mr Happy
Mr Strong
Mr Grumpy
Mr Forgetful
Mr Clumsy
Mr Fussy
Mr Noisy
Mr Impossible

22. Let’s try an example ….
SG General 2012

23. A
Sown in March
Height cm B
Cosmea C
Mallow D

24. Cup-shaped flowers A
Yellow centre C
Mount
Hood
Ice
Follies B D

25. Paired Statement Key Identify… Mr Noisy Hat go to 2 No hat go to 5
2. Round go to 3
Not Round go to 4
3. Red hat Mr Forgetful
No Red hat Mr Impossible
Mr Noisy
4. Smiling Mr Strong
Not smiling Mr Grumpy
5. Hair go to 6
No hair go to 7
6. Hair tidy Mr Fussy
Hair not tidy Mr Clumsy
7. Shoes Mr Noisy
No shoes Mr Happy

26. Paired Statement Key Identify… Mr Grumpy Hat go to 2 No hat go to 5
2. Round go to 3
Not Round go to 4
Mr Grumpy
3. Red hat Mr Forgetful
No Red hat Mr Impossible
4. Smiling Mr Strong
Not smiling Mr Grumpy
5. Hair go to 6
No hair go to 7
6. Hair tidy Mr Fussy
Hair not tidy Mr Clumsy
7. Shoes Mr Noisy
No shoes Mr Happy

27. Paired Statement Key Identify… Mr Clumsy Hat go to 2 No hat go to 5
2. Round go to 3
Not Round go to 4
3. Red hat Mr Forgetful
No Red hat Mr Impossible
Mr Clumsy
4. Smiling Mr Strong
Not smiling Mr Grumpy
5. Hair go to 6
No hair go to 7
6. Hair tidy Mr Fussy
Hair not tidy Mr Clumsy
7. Shoes Mr Noisy
No shoes Mr Happy

28. Paired Statement Key Single leaf go to 2 Several leaflets go to 6
2. Leaf with prickles HOLLY
Leaf with no prickles go to 3
Sycamore
3. Leaf edge with lobes go to 4
Leaf edge with no lobes go to 5
4. Lobes sharp pointed SYCAMORE
Lobes rounded OAK
5. Leaf with smooth edge BEECH
Leaf with serrated edge ELM
6. Leaflets in fan shape HORSE CHESTNUT
Leaflets in pairs go to 7
7. Leaf edge serrated ROWAN
Leaf edge plain ASH

29. 4
Spider
No shell
Earthworm

30. Go to 4 A
Black wing tip B
Go to 3 C
Wood white D
White wing tip E
Red Admiral F

31. Questions – Keys National 3/4 Biology Question Booklet
National 5 Biology, Booklet, Section 1
Turn to Section 1 and answer the following questions:
1 – 4
10, 11, 12, 13 (a)
Turn to Section 1, short answer questions
4(b) 10 11 12
13 (a) 15

32. British Birds Create a branched key for the following:
Crow thrush
Robin owl
Blue tit

33. Primates Create a branched key for the following chimpanzee orang-utan
human
Silverback gorilla
gibbon

34. Dogs
Create a branched key for the following

35. Questions – Keys National 3/4 Biology Question Booklet
National 5 Biology, Booklet, Section 1
Turn to Section 1 and answer the following questions:
1 – 4
10, 11, 12, 13 (a)
Turn to Section 1, short answer questions
4(b) 10 11 12
13 (a) 15