Answer:
The freshwater biome is defined as the biome that comprises the water bodies such as lake, pond, rivers and wetlands and where the concentration of salt is almost less than 1%. It occupies near about 20-25% of the total earth's surface.
Generally, the characteristics of the photic zone of a freshwater biome include-
- It forms the upper layer of the freshwater body, ranging from the surface of the water up to a certain depth.
- It is the layer where the sunlight can easily penetrate.
- The photosynthesis process is driven out extensively by the aquatic plants existing in this layer.
- The primary producers are present in this zone that provides the food to almost all the freshwater organisms.
- In this zone, the rate of respiration is equal to the rate of photosynthesis.
Explanation:
Whereas primary tissues allow for vertical growth, secondary tissues allow for lateral growth: they allow stems and roots to become wider. In roots, the formation of both secondary meristems involves the pericycle.
Adaptation and reproduction isolation
Bright flowers because that would attract insects to land and gather nectar and the pollen gets on them and travels to other flowers<span />
