LIFE SCIENCE

Detailed explanation-1: -Touch: Plants respond to touch through thigmotropism. Plants exhibit thigmotropism when they change their growth to bend around an object or grow up a wall or tree. Many types of vine plants, such as ivy, exhibit thigmotropism.

Detailed explanation-2: -Poison ivy (Toxicodendron radicans)is a woody shrub or vine with hairy-looking aerial roots. It grows to 10 feet or more, climbing high on trees, walls and fences, or trails along the ground. All parts of poison ivy, including the roots, are poisonous at all times of the year.

Detailed explanation-3: -A positive thigmotropism is a response towards the touch stimulus whereas a negative thigmotropism is a response away from the touch stimulus. Examples of positive thigmotropism are the growth of ivy on walls upon contact to walls and the coiling of tendrils or twiners upon contact to objects for support.