1. What are the two main types of leaves based on blade structure?
2. How does the leaf help the plant make food?
3. Why is transpiration important in plants?
4. What is the role of the midrib in a leaf?
5. Give one adaptation of leaves in desert plants.
Answer (2)
Leaves can be classified as simple or compound, assisting in food production through photosynthesis. Transpiration is vital for plant health, and the midrib offers structural support. Many desert plants adapt their leaves to conserve water, illustrating the diversity in leaf forms.
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The two main types of leaves based on blade structure are simple leaves and compound leaves . Simple leaves have a single, undivided blade, while compound leaves have a blade divided into smaller leaflets.
Leaves help the plant make food through a process called photosynthesis . During photosynthesis, leaves capture sunlight using a pigment called chlorophyll. The light energy is then used to convert carbon dioxide from the air and water from the soil into glucose (a type of sugar), which serves as food for the plant. Oxygen is released as a byproduct.
Transpiration is important in plants because it helps with the movement of water from roots to leaves. It also plays a role in cooling the plant and maintaining nutrient flow within the plant. By releasing water vapor through small openings called stomata, transpiration drives the uptake of water and dissolved minerals from the soil.
The role of the midrib in a leaf is to support the leaf's structure. It runs through the center of the leaf and helps transport nutrients and water throughout the leaf blade. The midrib also provides stability and strength to the leaf.
One adaptation of leaves in desert plants is the development of thick, waxy cuticles . This waxy layer reduces water loss by minimizing evaporation, helping the plant conserve water in a dry environment.
