NEET BIOLOGY

Detailed explanation-1: -Seedlings can only emerge from the soil when they push upward, exerting a force on the soil that is greater than the downward force of gravity. The turgor pressure inside of the plant cells must be high in order to have enough force to push up on the soil.

Detailed explanation-2: -Geotropism is a type of tropism where plants show some growth in response to gravity. Roots growing downwards is an example of geotropism.

Detailed explanation-3: -Abiotic factors such as drought, light, salinity, seed burial depth, soil pH, and temperature as well as disturbance events such as a fire, flooding or tillage can play an important role in initiating or inhibiting seed germination [3–4].