7. Define duckweed. 3. Water that is drinkable or has little or no salt content. 9. Why is it important for a seed to be planted on fertile ground? 10. What makes each biome unique? 11. What is one other way we can classify a biome as a freshwater biome? 12. What is influenced by the patterns and speed of water flow and the climate?

## Step1<br />Duckweed is a common name for a type of small, flat, green, flowering plant that is found in or near fresh water. It is known for its ability to float on the surface of the water.<br /><br />## Step2<br />The term "freshwater" refers to water that has a low concentration of salt, making it suitable for human consumption. This is in contrast to seawater, which has a high concentration of salt.<br /><br />## Step3<br />Seeds require fertile ground to germinate and grow into healthy plants. Fertile ground is rich in nutrients and moisture, which are essential for the growth of plants.<br /><br />## Step4<br />A biome is a large community of plants and animals that occupy a distinct region. Each biome is unique due to the specific combination of plants and animals that live there, which is determined by the climate and geography of the region.<br /><br />## Step5<br />Biomes can be classified as freshwater biomes based on the type of water bodies they contain, such as lakes, ponds, and streams. These water bodies are characterized by their low salt content.<br /><br />## Step6<br />The patterns and speed of water flow, as well as the climate, can influence the formation of various landforms. For example, fast-flowing water can erode the landscape, while slow-moving water can deposit sediment.