Explain the function of roots. 2. Realize how a stem can be modified to store food with an example. 3. A…

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Explain the function of roots. 2. Realize how a stem can be modified to store food with an example. 3. A carrot is an example of a modified root. Explain its modification and purpose.

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a) The role of plants in our ecosystem: Plants are the primary producers in most ecosystems, converting solar energy into chemical energy through photosynthesis. They release oxygen into the atmosphere, which is vital for most living organisms, and absorb carbon dioxide, helping to regulate the climate. Plants also provide food and habitat for countless organisms.

b) Two purposes of plant parts:
- Food storage: Many plant parts, like roots (e.g., carrots) and stems (e.g., potatoes), are modified to store excess food in the form of starch or sugars.
- Reproduction: Flowers, fruits, and seeds are specialized plant parts designed for sexual reproduction, while some stems and roots can facilitate vegetative propagation.
A stem can be modified to store food, particularly in underground stems.

Modification*
Underground stems, such as tubers (like potatoes) or rhizomes (like ginger), become swollen and fleshy due to the accumulation of starch and other nutrients.
Purpose*
This stored food provides energy for the plant to survive unfavorable conditions (e.g., winter or drought), supports new growth in the spring, and enables vegetative reproduction.
Example*
A potato is a modified underground stem (tuber) that stores a large amount of starch.
1. A carrot is an example of a modified root.
Modification*
The primary root of a carrot undergoes fleshy thickening, becoming conical or tapering towards the tip. This modification is primarily for the accumulation of stored food.
Purpose*
The carrot root stores sugars and starches produced by the leaves. This stored food provides energy for the plant's growth, especially during its second year when it flowers and produces seeds.

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Explain the function of roots. 2. Realize how a stem can be modified to store food with an example. 3. A carrot is an example of a modified root. Explain its modification and purpose.

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Modification*

Purpose*

Example*

Modification*

Purpose*

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