In many plants, change over from vegetative phase to reproductive phase takes place in response to
A. the length of the day
B. the severity of temperature
C. mainly the food material available in the soil
D. the oxygen present in the air
Answer:A
In many plants, change over from vegetative phase to reproductive phase takes place in response to
A. the length of the day B. the severity of temperature C. mainly the food material available in the soil D. the oxygen present in the air