Question

Out of the following, identify the metal present in the green plant:
A)Zinc
B)Aluminium
C)Magnesium
D)tin

Answer 1

Chlorophyll, which belongs to the most important class of pigments involved in photosynthesis, is the process by which light energy is converted by the synthesis of organic compounds into chemical energy. In nearly all photosynthetic species, including green plants, cyanobacteria, and algae, chlorophyll is present.

Complete answer:
Magnesium is a macronutrient that is important for both the growth and health of plants. It is involved in many different mechanisms, including photosynthesis, and is dependent on almost all living organisms. One of the three secondary nutrients needed by plants for regular, healthy growth is magnesium (Mg), along with calcium and sulphur. Do not be misled by the word "secondary" since it refers to a nutrient's amount and not its value. A lack of secondary nutrients is almost as harmful to the development of plants as a lack of two of the three primary nutrients (nitrogen, phosphorus and potassium) or a lack of micronutrients (iron, manganese, boron, zinc, copper and molybdenum).

In the dolomitic limestone used in most soilless growing media, magnesium can be contained, but it is typically not in adequate supply to satisfy the needs of plants. Water may be a source of a large amount of magnesium, so get it checked before picking a fertilizer. If the water does not contain at least 25 ppm of magnesium, fertilizer must be supplied.

Hence, the correct answer is option (C)

Note: In greenhouse crops and nursery crops, magnesium toxicity is very rare. High levels of magnesium may interfere with calcium or potassium absorption from plants and may cause deficiencies in plant tissue.