Chapter: 05. Plants In The Surroundings
Section A: Multiple Choice Questions (8 Marks)
Section B: Fill in the Blanks (8 Marks)
Section C: True/False (6 Marks)
Section D: Explanation of Terms (6 Marks)
Photosynthesis: The process by which a plant uses sunlight, carbon dioxide, and water to produce its own food. Germination: The process by which a seed grows into a young plant or sapling. Trunk: The main, thick stem of a tree from which various branches grow. Section E: Short Answer Questions (12 Marks)
Two functions of roots, other than anchoring, are storing food (e.g., carrots) and absorbing water and minerals from the soil. Climbers have weak stems and need external support to grow upright (e.g., money plant), while creepers also have weak stems but spread horizontally along the ground (e.g., watermelon). The main purpose of the cotyledons in a seed is to store all the food supply necessary for the baby plant (embryo) to grow and develop before it can make its own food. It is important to add compost or manure to plants every few months because these substances add essential nutrients to the soil, which are vital for the healthy growth and development of the plants. Section F: Diagram-Based Questions (5 Marks)
a. A: Flower
B: Leaf
C: Stem
D: Root
b. Part B (Leaf) is responsible for preparing food for the plant.
Section G: Long Answer Questions (5 Marks)
Leaves are essential for all living organisms on Earth because they perform photosynthesis, the process of making food using sunlight, carbon dioxide, and water. During photosynthesis, leaves release oxygen into the atmosphere. This oxygen is crucial for the survival of almost all living organisms, including humans and animals, who breathe it to live. Without the oxygen produced by leaves, life as we know it would not be possible on Earth. 
Answer key