Download REVISION SHEET - Variation for Survival - KS3

Chapter 1 – Variation for Survival
What does the term Species mean?
How are these organisms adapted to survive?
Polar bear:
When drawing a graph, what must you include?
Describe and give 2 examples of:
Continuous variation
Discontinuous variation
Calculate the average and then draw a graph to show the data:
Reaction time (ms)
Age (years)
What is the process of selective breeding?
Tiger:
What is a nucleus of a cell?
Cactus:
How can different organisms create clones?
What is DNA?
Explain how organisms can go extinct?
How many chromosomes are in and egg or sperm cell
compared with a normal body cell? Why?
1
2
3
10 – 19
7
10
6
20 – 29
6
5
7
30 – 39
11
13
45
40 – 49
48
46
51
50 – 59
101
96
90
60 – 69
180
157
176
70 – 79
384
287
311
Average
time (ms)