Mineral Nutrition In Plants Question 96
Which of the elements is not essential for plant growth
Options:
A) Nitrogen is a chemical element with the symbol N and atomic number 7. It is a colorless, odorless, and tasteless gas that makes up about 78% of Earth’s atmosphere. Nitrogen is essential for life and is a key component in proteins, nucleic acids, and other biological molecules. It exists in various forms, including diatomic molecules (Nā), nitrates, and ammonia. Nitrogen plays a crucial role in the nitrogen cycle, which is vital for sustaining life on Earth.
B) Sulfur
C) Sodium is an essential mineral that plays a key role in maintaining fluid balance, nerve function, and muscle contractions. It is also necessary for the proper functioning of the heart and is involved in the transmission of nerve impulses. A deficiency in sodium can lead to hyponatremia, while excessive intake may result in hypertension. Sodium is primarily obtained through dietary sources such as table salt, processed foods, and certain vegetables.
D) Potassium is an essential mineral that plays a critical role in maintaining fluid balance, nerve signaling, and muscle contractions. It is also involved in the regulation of blood pressure and is necessary for the proper functioning of the heart. A deficiency in potassium can lead to muscle weakness, cramps, and irregular heartbeats, while excessive levels can cause nausea, vomiting, and in severe cases, cardiac arrest. Good dietary sources of potassium include bananas, oranges, spinach, potatoes, and tomatoes. The recommended daily intake for adults is approximately 2,600 to 3,400 milligrams, which can typically be achieved through a balanced diet.
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Answer:
Correct Answer: C
Solution:
Sodium is essential for blue-green algae and at least for some of the higher plants.
It regulates the transport of amino acids to the nucleus and therefore, controls the synthesis of nucleoprotein, but it does not take any part in plant growth.
BETA
