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Plant Composition and Essential Nutrients

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Plant Composition and Essential Nutrients

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Questions and Answers

What percentage of a plant's composition is made up of water?

50 - 70 %

70 - 90 % (correct)

10 - 20 %

30 - 50 %

What is the main function of essential plant nutrients?

To regulate the plant's water balance

To provide structure and support to the plant

To facilitate the normal growth cycle of the plant (correct)

To protect the plant from pathogens

Which of the following is classified as a macronutrient?

Molybdenum

Nitrogen (correct)

Copper

Boron

Which element's essentiality was established in 1987?

Nickel Signup and view all the answers

What is the classification of calcium and magnesium?

Secondary macronutrients Signup and view all the answers

How many essential plant nutrients have been identified?

More than 15, but the list may not be final Signup and view all the answers

What is the primary function of carbon in plants?

To form the backbone of plant molecules Signup and view all the answers

Which element is taken up by plants in the form of NO3- and NH4+?

Nitrogen Signup and view all the answers

What is the typical range of sulfur in plants in terms of percentage of dry matter?

0.2 – 1.0 Signup and view all the answers

Who discovered the essentiality of iron in 1860?

Not mentioned in the text Signup and view all the answers

What is the function of oxygen in plants?

To provide energy for cellular respiration Signup and view all the answers

What is the typical range of copper in plants in terms of parts per million (ppm) of dry matter?

5 - 15 Signup and view all the answers