They must preform photosynthesis so they can acquire energy and nutrition.
<span>The trouble with identifying bacteria is that a lot of them look exactly the same. So, identifying by shape and such will only get you so far. However, two kinds of bacteria that look exactly the same under the microscope could have very different physiologists. One may be able to use a certain sugar as an energy source while the other one cannot, for example. Therefore, you can use morphology (physical characteristics) to narrow down the possibilities, but then you must complete the identification using the bacteria's physiology.</span>
Your correct answer would be "figure B" mainly because of the fact that a polygon would be a shape that would contain no curves what so ever. And as we can see above, figure b would contain this.
Your answer: Option B.
