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Biology - Parts of a flowering plant and their functions

Grade 4IGCSE

Review the key concepts, formulae, and examples before starting your quiz.

🔑Concepts

The roots anchor the plant in the soil and absorb H2OH_2O (water) and dissolved minerals necessary for growth.

The stem provides support for the leaves and flowers and acts as a transport system for H2OH_2O and nutrients using specialized tubes.

The leaves are the primary site for photosynthesis, where the plant captures light energy to produce glucose.

Chlorophyll is the green pigment found in leaves that absorbs light energy for the process of photosynthesis.

The flower is the reproductive part of the plant, responsible for producing pollen, seeds, and fruits.

Plants require CO2CO_2 (carbon dioxide) from the air and H2OH_2O from the soil to create their own food.

📐Formulae

Carbon Dioxide(CO2)+Water(H2O)Sunlight/ChlorophyllGlucose+Oxygen(O2)\text{Carbon Dioxide} (CO_2) + \text{Water} (H_2O) \xrightarrow{\text{Sunlight/Chlorophyll}} \text{Glucose} + \text{Oxygen} (O_2)

💡Examples

Problem 1:

A student removes all the leaves from a small plant. What will happen to the plant's ability to produce food?

Solution:

The plant will no longer be able to produce food because the leaves contain the chlorophyll needed for photosynthesis.

Explanation:

Photosynthesis is the process where CO2CO_2 and H2OH_2O are converted into glucose. Without leaves, the plant cannot capture sunlight.

Problem 2:

Explain why a plant might wilt if its roots are damaged.

Solution:

The plant will wilt because it cannot absorb H2OH_2O from the soil to maintain its structure and carry out life processes.

Explanation:

Roots are responsible for the uptake of H2OH_2O. If they are damaged, the plant cannot replace the water lost through the leaves.