Question

Monika planted two plants in pot A and pot B. She poured the same amount of water into both the pots but she placed pot A out in the open ground. Where sunlight can fall on it and pot B in a dark room where there is no sunlight. After some days she observed that the plant in pot A has green leaves and grown in size while the plant in pot B has died can you tell the reason?

(a) The plant in pot A is stronger
(b) Plants need light to prepare food
(c) Monika poured more water in pot A
(d) None of the above

Answer 1

Hint: Plants need sunlight for the preparation of their own food by the process called photosynthesis. Sunlight stimulates the growth of plants.

Complete answer:
Chlorophyll is the green color pigment present in the plants that perform photosynthesis. Green plants in presence of sunlight, by using water and carbon dioxide prepare their own food i.e, carbohydrates, and release oxygen. This process is called photosynthesis. All the organisms that perform photosynthesis require sunlight.
The plant placed in pot A has a source of light and by using that it prepared its own food by photosynthesis and started to grow and developed green leaves whereas in-plant placed in pot-B lack source of light, it cannot perform photosynthesis so, the plant died. It is evident that plants require light to prepare food.

Additional Information: - In the ecosystem, producers occupy the first trophic level. All green plants come under producers
- The organisms which can prepare their own food are called autotrophs, if they produce their own food by using sunlight they are called photoautotrophs. Almost all the green plants and cyanobacteria come under photoautotrophs
- chlorophyll is present in different plants such as leaves, stems, and roots. The parts with chlorophyll appear to be green in color.
- along with the plants, various microorganisms like bacteria also prepare their own food, such types of bacteria are called photosynthetic bacteria. They transform captured light into chemical energy and obtain carbon from the atmospheric carbon dioxide.
So, the correct answer is ‘plants need light to prepare food’

Note: Examples of photosynthetic bacteria are chromatium and chlorobium.
An example of photosynthetic roots is Taeniophyllum.
Examples of photosynthetic fungi are Chlamydomonas, volvox, ulothrix, spirogyra, and chara.