The feet of a gull showing webbed toes. Webbed toes is the common name for syndactyly affecting the feet. It is characterised by the fusion of two or more digits of the feet. This is normal in many birds, such as ducks; amphibians, such as frogs; and mammals, such as kangaroos.he feet of a gull showing webbed toes. Webbed toes is the common name for syndactyly affecting the feet. It is characterised by the fusion of two or more digits of the feet. This is normal in many birds, such as ducks; amphibians, such as frogs; and mammals, such as kangaroos.
The sporangia produce very tiny spores. Spores are different to seeds. They do not contain plant embryos or food stores. When the sporangia break open, the spores are released and dispersed by the wind.If the spore lands in a suitable environment, it can grow into a tiny plant called a gametophyte.he sporangia produce very tiny spores. Spores are different to seeds. They do not contain plant embryos or food stores. When the sporangia break open, the spores are released and dispersed by the wind.
1 Plants have a life cycle in which two multicellular forms alternate. 2  One is the gametophyte (produces gametes) and another is the sporophyte (produces spores). 3  During the evolution of plants, the gametophyte became reduced and dependent on the sporophyte.