NEET BIOLOGY

Detailed explanation-1: -In the absence of gravity, plants use other environmental factors, such as light, to orient and guide growth. A bank of light emitting diodes (LEDs) above the plants produces a spectrum of light suited for the plants’ growth.

Detailed explanation-2: -This root growth strategy is called “skewing.” Darwin hypothesized that a combination of gravity and the root touching its way across the surface was behind it-and for 130 years, that’s what everyone else thought too. Roots grew with skew – without gravity.

Detailed explanation-3: -You might think that gravity has a major influence because roots always grow downwards. However, roots actually grow to cover more area in the soil and absorb more nutrients. That means that in the microgravity environment of space, the roots would change in size and direction to absorb more nutrients.

Detailed explanation-4: -Gravity is an important influence on root growth, but the scientists found that their space plants didn’t need it to flourish. The research team from the University of Florida in Gainesville thinks this ability is related to a plant’s inherent ability to orient itself as it grows.

Detailed explanation-5: -Normally, plant roots grow downward, where it’s easy for them to soak up water and nutrients that make their way into the soil. In space, roots grow in every direction, and water and other essential plant foods float.