In a water culture experiment, a plant showed poor growth and yellowing of the leaves. These may be due to deficiency in
copper
iron
magnesium
calcium
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According to the web search results, the most likely answer is **B. iron**. Iron deficiency causes yellowing of the leaves, especially the younger ones, because iron is essential for the synthesis of chlorophyll. Magnesium deficiency can also cause yellowing, but it affects the older leaves first and the veins remain green. Copper deficiency causes pale green leaves and stunted growth. Calcium deficiency causes poor root development, weak slender plants, and stunted growth.
be adviced both iron and magnesium re correct..their defieciencies results to chlorosis
B. Iron
- **Magnesium (Mg)** deficiency indeed causes **interveinal chlorosis**, but **primarily in older leaves**, since magnesium is **mobile** in plants.
- **Iron (Fe)** deficiency also causes **interveinal chlorosis**, but it shows up in **young leaves**, as iron is **immobile** and cannot be transported from older to younger tissues.
- In a **water culture experiment**, where **young seedlings** are grown hydroponically, the symptoms described (chlorosis and poor growth) **in young leaves** point more accurately to a **deficiency in iron**.
So yes, if the affected plant in the experiment is a **young seedling**, then **iron deficiency (Option B)** is indeed the **most appropriate answer**.
The correct answer here is Fe... My school is actually correct..
Here, we're talking about experiment!.. The plant in question surely is young.... This gives enough validation to clear all doubts !
I highly recommend,the answer is magnesium, because irrespective of both turning flowers yellow, magnesium deficiency also result in poor growth as opposed to iron
@myschool, please be dropping explanations especially when it comes to confusing questions like this. Both iron nd magnesium are both correct, but why did you choose iron as your answer
The correct answer is:
C. Magnesium
Here’s the logic, nice and crisp like exam day thinking 🧠
:
Magnesium is a central component of chlorophyll (the green pigment in leaves).
When it’s lacking, the plant can’t make enough chlorophyll → leaves turn yellow (chlorosis) and growth becomes poor.
Why not the others?
A. Copper 
affects enzymes, not mainly leaf yellowing
B. Iron also causes yellowing, but usually in young leaves first
D. Calcium affects root and meristem growth, not general yellowing
take note the correct answer to this question is magnesium because magnesium affect the overall growth of a plant especially in older plant unlike iron which primarily affect the leaves especially in newer plant, and as the question implies we are talking about the overall plant and not just the leaves
