Question:
The flowers of crocus and tulips show _______________ (i) Photo tropy (ii) Photo nasty (iii)Thermo nasty (iv) Haplo nasty (v) Nycti nasty
A(i) and (ii)
B(ii) and (iii)
C(iii) and (iv)
D(i) and (v)
Answer:
B. (ii) and (iii)
Explanation:
Crocus and tulip flowers respond to temperature by closing when the temperature drops. The temperature decrease required for closure is roughly equal to the temperature increase required for opening.