The sun energy is channeled to the biosphere through the process of photosynthesis in which solar energy from sunlight is converted to chemical energy.
The chemical energy is then used or stored by plants inform of starch. This chemical energy is ten passed to other organisms (heterotrophs) when they feed on the plants.
Answer: The vulnerable embryo must be sheltered from desiccation and other environmental hazards. In both seedless and seed plants, the female gametophyte provides protection and nutrients to the embryo as it develops into the new generation of sporophyte.
