Geotropism Stimulus = Response =

A gravity, plant stem grows upwards and roots grow downward
B plant stems face the sun, roots grow in soil
C plant roots grow downwards and plant stem grow upwards
D Plant stem responds to touch, plant leaves respond to sunlight

Suspension typei

The answer to this will be from your lab notes/procedure. it would be best to ask another student who participated in the lab as we do not know what was done, what enzyme or if the temperature is celsius or fahrenheit. if i were to guess though i'd say the rate stopped due to enzyme denturing at high temperature