The right answer for the question that is being asked and shown above is that: "a.Cyanobacteria are photoautotrophs." The atmosphere that we depend on for our survival is enriched by numerous cyanobacteria. This fact justifies the characteristic of cyanobacteria that is Cyanobacteria are photoautotrophs.
A molecule is non-polar if the charge distribution is symmetric and it is polar if the charge distribution is not symmetric.
<span>Echinoderms are marine invertebrates, they dwell under the sea unlike that of others that mostly live in land.
<em>Hope this helps:)</em></span>
<span> ancient organism remains, fossil layers, similarities among organisms alive today, similarities in DNA, and similarities of embryos. Those are the 5 pieces of evidence of Evolution.</span>
1 Eyesore: Unpleasant to see
2 Noise Pollution: They are noisy for people who live around them
3 Huge initial capital investment: Costs of starting up is huge. Cost of manufacturing is huge
4 Not always running: Can’t rotate when there is no wind