The plant part which exhibits negative geotropism is __________.

A growing seedling is kept in the dark room. A burning candle is placed near it for a few days. The top part of the seedling bends towards the burning candle. This is an example of ____________.

The root of the plant is __________.

i) positively phototropic but negatively geotropic

ii) positively geotropic but negatively phototropic

iii) negatively phototropic but positively hydrotropic

iv) negatively hydrotropic but positively phototropic

The non-directional movement of a plant part in response to temperature is called ________.

Dandelion flowers open the petals in bright light during the day time but close the petals in dark at night. This response of Dandelion flowers is called ___________.