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 1

Answer:

B. (ii) and (iii)

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.