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Question

A small aquatic plant was put in each of the petridishes -x, y & z, containing different culture solution. After six weeks the plant in dish x had the same number of leaves as it had previously & were all small and yellowish.Plant in dish Y had more leaves of normal size and dark green color .Plants in dish Z had more leaves of normal size but very pale. Which of the following show the elements missing in the culture

A
X \magnesium , y/ phosphorus , z/ Nitrogen
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B
X \phosphorus , y/magnesium , z/ Nitrogen
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C
X \phosphorus , y/Nitrogen , z/magnesium
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D
X \magnesium , y/ Nitrogen, z/ phosphorus
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Solution

The correct option is A X \magnesium , y/ phosphorus , z/ Nitrogen
A, X \magnesium , y/ phosphorus , z/ Nitrogen is the correct answer.
The most common nutrient problem associated with chlorosis is a lack of iron, but yellowing may also be caused by manganese, zinc, or nitrogen deficiencies.
Phosphorus is an integral part of fertilizers, therefore in Y dish leaves were green, pale yellow leaves of normal size are due to deficiency of nitrogen.

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