Formative Practice 3.1 (Form 5 Biology Textbook Exercise and Answer)

Question 1:
How are macronutrients different from micronutrients?

Macronutrients are required by plants in large quantities while micronutrients are required in small quantities.

Question 2:
State three nutrients which can cause chlorosis if there is a lack of any of these nutrients.

Nitrogen, chlorine and zinc.

Question 3:
Corn plants are very sensitive to nutrient deficiency. How does the NPK (nitrogen, phosphorus and potassium) fertiliser stimulate healthy growth of corn plants?

Nitrogen stimulates leaf development. Nitrogen is necessary in chlorophyll formation for photosynthesis. Phosphorus stimulates healthy root development. Potassium is involved in development of the whole plant including development of flowers and fruit.

Question 4:
Roots and leaves are the medium to transport nutrients in plants. With your knowledge in biology, support this statement.

Roots act as transportation medium that absorb water and nutrients in the soil and transport them to all parts of the plant. The stomata on the leaves absorb carbon dioxide and oxygen from the atmosphere for the use of the plant cells.

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