BOTANY

Detailed explanation-1: -The turgor pressure inside of the plant cells must be high in order to have enough force to push up on the soil. If the turgor pressure is low, the seedling will not have enough force to emerge and overcome the force of gravity. 1.

Detailed explanation-2: -For example, if a plant is lacking water inside of its cells, wilting will occur as a response. The lack of water in the cells causes a lack of pressure, known as turgor pressure, which is what helps to keep the plant and its leaves upright and growing toward a light source.

Detailed explanation-3: -3. Vocabulary tropism plant growth toward or away from a stimulus. phototropism. the response of a plant to light; stems bend toward the light, roots. move away from the light.

Detailed explanation-4: -Plant roots always grow downward because specialized cells in root caps detect and respond to gravity. This is an example of a tropism. A tropism is a turning toward or away from a stimulus in the environment. Growing toward gravity is called geotropism.

Detailed explanation-5: -The movement of plant due to touch is known as a thigmotropic movement. Thigmotropism is a directional growth movement which occurs as a mechanosensory response to a touch stimulus. For example, once a shoot touches a suitable support, it grows towards the surface it is touching.