Plant Nutrition

Each subtopic includes About section, revision page link, 10 preview questions, and practice CTAs.

Photosynthesis

Subtopic

Photosynthesis under Plant Nutrition for Grade 12 IGCSE.

About Topic & Revision

Preview questions (no answers)

1.
$After performing a starch test on a leaf using iodine solution, a student observes that the leaf turns blue-black. What does this result indicate?$
A. $The leaf contains high amounts of reducing sugars$
B. $The leaf has been kept in the dark for 48 hours$
C. $The leaf has been denatured by boiling water$
D. $Photosynthesis has occurred and starch is present$
2.
$In the simplified vertical section of a leaf shown below, which labeled tissue layer contains the highest concentration of chloroplasts for maximum photosynthesis?$
A. $Layer A (Upper Epidermis)$
B. $Layer C (Spongy Mesophyll)$
C. $Layer B (Palisade Mesophyll)$
D. $Layer D (Lower Epidermis)$
3.
$What is the primary function of chlorophyll during the process of photosynthesis?$
A. $To reflect green light to cool the leaf$
B. $To absorb light energy and convert it into chemical energy$
C. $To convert glucose into starch for long-term storage$
D. $To facilitate the diffusion of carbon dioxide into the leaf$

Download the worksheet for Plant Nutrition - Photosynthesis to practice offline. It includes additional chapter-level practice questions.

Leaf structure

Subtopic

Leaf structure under Plant Nutrition for Grade 12 IGCSE.

About Topic & Revision

Preview questions (no answers)

1.
$Identify the layer described in the following sequence that is specifically adapted with large intercellular air spaces for gas exchange.$
A. $Upper Epidermis$
B. $Palisade Mesophyll$
C. $Spongy Mesophyll$
D. $Lower Epidermis$
2.
$Which of the following specialized cells are responsible for controlling the opening and closing of the stomatal pores?$
A. $Sieve tube cells$
B. $Guard cells$
C. $Companion cells$
D. $Epidermal cells$
3.
$In which tissue layer of the leaf is the rate of photosynthesis typically the highest due to a high concentration of chloroplasts?$
A. $Xylem$
B. $Spongy mesophyll$
C. $Palisade mesophyll$
D. $Upper epidermis$

Download the worksheet for Plant Nutrition - Leaf structure to practice offline. It includes additional chapter-level practice questions.

Mineral requirements

Subtopic

Mineral requirements under Plant Nutrition for Grade 12 IGCSE.

About Topic & Revision

Preview questions (no answers)

1.
$Through which specialized cells do plants primarily absorb mineral ions from the soil solution?$
A. $Palisade mesophyll cells$
B. $Phloem sieve tube elements$
C. $Root hair cells$
D. $Guard cells$
2.
$Nitrate ions are absorbed by plant roots to synthesize which of the following biological molecules?$
A. $Cellulose$
B. $Proteins$
C. $Starch$
D. $Triglycerides$
3.
$NO_{3}^{-}$
A. $The leaves will turn dark purple.$
B. $Stunted growth and yellowing of older leaves.$
C. $The plant will produce extra flowers but no fruit.$
D. $The stems will become excessively thick and woody.$

Download the worksheet for Plant Nutrition - Mineral requirements to practice offline. It includes additional chapter-level practice questions.

Plant Nutrition - IGCSE Grade 12 Biology Notes & Revision | Krit.club