Question

Higher Order Thinking Skill.

There are 3 plants A, B and C. The flowers of A open their petals in bright light during the day but closes when it gets dark at night. On the other hand, the flowers of plant B open their petals at night but closes during the day when there is bright light. The leaves of plant C fold up and droop when touched with fingers or any other solid object.

1. Name the phenomenon shown by the flowers of plant A and B.
2. Name one plant each which behaves like the flowers of plant A and B. 
3. Name the phenomenon exhibited by the leaves of plant C. 
4. Name the plant which behaves like the leaves of plant 'C'?

Answer 1

1. The phenomenon shown by the flowers of plants A and B is photonasty.
2.  A flower which behaves like the flower of (i) plant A is dandelion and (ii) plant B is moonflower.
3. The leaves of plant C exhibit thigmonasty.
4. A plant whose leaves behave like those of plant C is Mimosa pudica.
5. The plants A and B exhibit the phenomenon based on growth movements.