Plant Nutrition, Water & Mineral Nutrition is one of 9 topics in the Grade 11 Agricultural Sciences CAPS syllabus, covered across 3 lessons on Study Vault. Below are real practice questions from this topic with full worked answers.
Sample practice questions
Easy
1. What are the two raw materials plants use during photosynthesis?
Carbon dioxide and water
Oxygen and glucose
Nitrogen and water
Glucose and chlorophyll
Answer: Carbon dioxide and water — Photosynthesis uses carbon dioxide and water as raw materials, converting them, using light energy and chlorophyll, into glucose and oxygen.
Easy
2. Name the green pigment inside chloroplasts responsible for absorbing light energy for photosynthesis.
Answer: chlorophyll — Chlorophyll is the green pigment within chloroplasts responsible for absorbing light energy used in photosynthesis.
Medium
3. Why does a healthy plant leaf generally appear green?
Chlorophyll absorbs red and blue light strongly but reflects green light
Chlorophyll absorbs only green light
Plant leaves contain no pigments at all
Green light is the only wavelength plants cannot use
Answer: Chlorophyll absorbs red and blue light strongly but reflects green light — Chlorophyll absorbs light most strongly in the red and blue regions of the spectrum while reflecting green light, which is why healthy leaves appear green to our eyes.
