(a) Petiole (d) Trunk (c) Node (0) Which one of the following is essential for photosynthesis : (a) Carbon dioxide (b) Nitrogen (c) Oxygen (d) Soil 1. Short Answer Questions : Name the following: (i) The part of the plant which grows under the ground : (ii) The part of the plant which grows above the soil : (iii) The wide flat portion of the leaf : 2. What are the four functions of roots ? 3. Mention the functions of the following: (i) Spines (ii) Tendril (iii) Scale leaves 4. Define venation. What are the different types of venation found in the leaves ? 5. Describe the modifications of leaf in any one insectivorous plant. 6. Write the two main functions of leaves. 7. Define : (i) Photosynthesis (ii) Transpiration Long Answer Questions (Write the answers in your notebook)
Answers
0) d) Soil
1) i) Roots
ii) Shoot
iii) leaf blade
2) • Anchoring of the plant to the soil.
• Absorption of water and nutrients from the soil.
• Conduction of absorbed water and nutrients to stem.
• Storage of food.
3) i) act as defensive structure since it can protect the plants against grazing animals.
ii) provide support to the plant as it climbs up a structure.
iii) protect the axillary bud that they bear in their axil.
4) the arrangement of veins in a leaf or in an insect's wing.
5) The leaf base is modified into an expanded structure, the petiole is modified into a tendril which holds the lamina in vertical position, the lamina is modified into a pitcher to capture and digest insects and the leaf apex is modified into a lid to attract the insects.
6) The two main functions performed by the leaf are photosynthesis and transpiration. Photosynthesis is the process by which green plants make their food from carbon dioxide and water in the presence of sunlight.
7) i) Photosynthesis is the process by which plants use sunlight, water, and carbon dioxide to create oxygen and energy in the form of sugar. 5 - 8.
ii) (of a plant or leaf) the exhalation of water vapour through the stomata.