Which organism in an autotroph?
Oganisms that can photosynthesize or chemosynthesize are considered autotrophs. It means they can self feed themselves. These are plants that perform photosynthesis, green algae and some cyanobacteria (chemosynthesis)
How is energy transferred from the rays of the sun to an autotroph and then from an autotroph to a heterotroph?
No. A Spirochete is an organism from a phylum of bacteria (Spirochaetes) and is generally spiral in shape. An autotroph is an organism that produces its own food (generally by photosynthesis). The opposite of an autotroph is called a heterotroph. Spirochetes, like other bacteria, are heterotrophs. They are not able to produce their own food.
It is easy to mistake an Earthworm as an autotroph (an organism that synthesizes its own energy from inorganic sources) because it consumes soil and dirt. However, soil actually contains organic matter. By definition, a heterotroph is an organism that consumes organic matter for energy. An earthworm is therefore a heterotroph, not an autotroph.