Describe 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.

Here are the answers to your questions:

1. 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.

2. A stem can be modified to store food, particularly in underground stems.