The times taken by 18 people to complete a puzzle are shown. Time, t minutes Frequency
8-1
0 5
7
10 < t < 20
5
20 < t < 30
7
30 < t < 40
1
Frequency
Draw a frequency polygon
for the data.
2
1
0
0
40
10 20 30
Time, t (minutes)

Aflower has 26 chromosomes. to create a new flower, how many chromosomes would a sperm cell have? what is this process called? part 2: within a flower cell that has 26 chromosomes, how many chromosomes would a cell that is created within the stem of a flower as it grows, have? what is this process called?