Question

which of the following describes an organism that obtains energy from light?
autotroph only
heterotroph and chemotroph
phototroph only
autotroph, phototroph, and chemotroph
autotroph and phototroph

Explanation:

• An autotroph is an organism that can produce its own food. Some autotrophs (like plants) are phototrophs as they use light (through photosynthesis) to obtain energy.
• A heterotroph cannot produce its own food and relies on other organisms. A chemotroph obtains energy from chemical compounds, not light.
• Since the organism in question gets energy from light (so is a phototroph) and if it is making its own food (using light energy, like in photosynthesis), it is also an autotroph.

Answer:

autotroph and phototroph