17. A student investigated the growth of yeast X and yeast Y at different temperatures by using the following procedure
Procedure
Each type of yeast was placed in Individual tofubes containing
Identical sug solutions
• The test tubes were then heated at varying temperatures
• The student recorded growth by measuring the height of froth
Toam) produced by each yeast mature
The graph shows the results of this investigation
Yeast Growth at Different Temperatures
Key
Height of Froth (cm)
yeast
yeast Y
0 5 10 15 20 25 30 35 40
Temperature (C)
Which explanation of yeast growth is best supported by the student's data?
А Yeast Y can grow at greater temperatures than yeast X can.
B. Both yeasts experience peak growth at about the same temperature.
C. Yeast Y shows more growth above a temperature of 30°C than yeast X shows.
D. Both yeasts show increasing growth at increasing temperatures of 25°C or less.