Biology: Plant Nutrition and Transport

Question 1

Photosynthesis symbol equation

Answer 1

6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂

Question 2

Photosynthesis word equation

Answer 2

Carbon dioxide + Water → Glucose + Oxygen

Question 3

Plant adaptations for efficient photosynthesis

Answer 3

-Leaves with broad surface area
-Thin leaves
-Air spaces inside the leaf
-Stomata below the leaf
-Photoreceptive guard cells
-Hydrosensitive roots
-Chloroplasts near leaf surface
-Transparent leaf upper epidermis
-Vascular bundle network of xylem and phloem transport
-Waxy cuticle to prevent water loss
-High root surface area

Question 4

Factors affecting Rate of Photosynthesis

Answer 4

-Light intensity
-Carbon dioxide concentration
-Temperature

Question 5

Mineral ions needed for plant growth

Answer 5

-Nitrates: needed for cell growth
-Phosphates: needed for respiration and cell growth
-Potassium: aids enzymes in photosynthesis and respiration

Question 6

Mineral ion deficiency consequences for plants

Answer 6

-Nitrates: Stunted growth, yellow old leaves
-Phosphates: Poor root growth, purple old leaves
-Potassium: Poor flower growth, discoloured leaves

Question 7

Name the plant transport systems

Answer 7

Xylem and Phloem

Question 8

Xylem

Answer 8

Plant transport system that carries water and minerals from the roots up to the shoot and the leaves, process is called transpiration.

Question 9

Phloem

Answer 9

Plant transport system that moves Glucose and other Sugars from the leaves down into the shoot and roots.

Question 10

Transpiration

Answer 10

Transpiration is the loss of water in a plant through diffusion or evaporation

Question 11

Factors that affect transpiration rate

Answer 11

-Light intensity
-Temperature
-Wind speed
-Humidity

Question 12

Define photosynthesis

Answer 12

Photosynthesis is the chemical process by which Carbon dioxide and Water react to make Glucose and Oxygen