Live demonstration biology class

1 hour 17 mins 52 secs

9 mins 29 secs

3 mins 7 secs

8 mins 38 secs

9 mins 23 secs

28 secs

10 mins

8 mins 38 secs

11 mins 20 secs

6 mins 46 secs

4 mins 12 secs

13 mins 5 secs

36 secs

5 mins 1 sec

15 mins 29 secs

1 min 22 secs

2 mins 33 secs

2 mins 39 secs

24 mins 23 secs

27 mins 29 secs

2 mins 37 secs

1 min 16 secs

17 mins 58 secs

29 secs

33 mins 6 secs

29 mins 23 secs

15 secs

11 mins 28 secs

3 mins

5 mins 33 secs

53 secs

56 mins 58 secs

52 mins 32 secs

9 mins 59 secs

6 mins 18 secs

24 mins 14 secs

9 mins 6 secs

22 mins 39 secs

30 mins 26 secs

20 mins 36 secs