Photoautotrophs use a. light as an energy source and CO2 as a carbon source. b. light as an energy source and methane as a carbon source. c. N2 as an energy source and CO2 as a carbon source. d. CO2 as both an energy source and a carbon source.

Video transcript

Hello everyone and welcome to today's video where we're going to be identifying which of the following statement applies to follow all the traffic bacteria. And so his word photo out of traffic is a huge word. So let's try to go over it and just define it before we jump into the problem so that we can be better prepared to solve it. Photo traffic organism is an organism that is able to produce their own energy via photosynthesis or just using light. And so an example of this that we see every day is plants. So now that we know this, let's jump ahead and start solving the problem. They have the answer choice A is that they use sunlight photo electric effect bacteria use sunlight as an energy source. If we know anything about how plants work in terms of photosynthesis they need sunlight as an energy source. Otherwise if they're left out of the sun for too long they might die because they're not able to produce photosynthesis for energy. And so this is a true statement and we cannot cancel it out. Moving on to option B. We have that photo auto traffic bacteria use carbon dioxide as a carbon source, going back again to the photosynthesis in plants example we have that these plants use carbon dioxide to perform photosynthesis along with sunlight and other elements. And so they produce oxygen as a result. So they take in carbon dioxide they produce oxygen. This carbon dioxide is going to be the inorganic carbon servers that we are looking for. And so this also applies to photo to trophic bacteria and we cannot cancel it out. Moving on, we have option C they use hydrogen sulfide as a protesters. So this is where it gets complicated plants usually use H as the protesters where they split the H 20 molecule releasing the hydrogen as protons and the oxygen into the air so that we can breathe it. This is how oxygen is produced. However, some of these photo auto trophic bacteria are anaerobic, so if oxygen, if they come in contact with oxygen, they will die. And so instead of using water which might kill them if they perform photosynthesis using using it, they use what we call hydrogen sulfide, which has a very similar structure. So they split this hydrogen sulfide molecule releasing the protons so as the proton sirs and also sulfide which is not able to damage them. And so all of these statements so far have been true and the correct answer choice then be answer choice. D. So thank you very much for sticking around until the end of this video. I really hope it helped you and I hope to see you on the next one