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Plant Nutrition (Grades 11-12)

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Plant Nutrition

What are the four elements found in the highest concentrations within plants?
  1. phosphorus, calcium, zinc, carbon
  2. carbon, hydrogen, oxygen, nitrogen
  3. magnesium, sulfur, oxygen, potassium
  4. iron, lead, nitrogen, hydrogen
Which element do plants NOT obtain directly from the soil?
  1. carbon
  2. nitrogen
  3. potassium
  4. zinc
Which mineral is a component of both proteins and nucleic acids?
  1. magnesium
  2. iron
  3. potassium
  4. nitrogen
Which element would need to be added to the soil in order for a plant to form membranes and nucleic acids?
  1. phosphorus
  2. potassium
  3. nitrogen
  4. carbon
What is an advantage of using inorganic fertilizers when growing plants?
  1. They improve the physical properties of the soil.
  2. They can be taken in almost immediately by the roots.
  3. They are of higher quality than organic fertilizers.
  4. They contain minerals that are in their proper ionic form.
A nitrogen deficiency in plants is often characterized by what symptom?
  1. The young leaves become yellow.
  2. The young leaves turn orange.
  3. The old leaves turn yellow.
  4. The old leaves turn orange.
Plants often use the essential element                      as a chemical messenger.
Decomposed plant litter produces a dark colored organic material called                 .
What happens during the process of nitrogen fixation?

Which statement about mycorrhizae is true?
  1. They spread by way of plant seeds.
  2. They form structures that do not need oxygen.
  3. They increase the surface area of the roots.
  4. They are found only in tropical species of plants.
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