The correct answer is cyanobacteria (ancient cyanobacteria).
The huge concentration of oxygen in the atmosphere is believed to have been initially produced by the actions of ancient cyanobacteria. They are usually observed as symbionts with a number of another group of species, like coral, lichens (fungi), Azolla (pteridophytes), angiosperms, and others.
The atmosphere of oxygen was generated by various cyanobacteria at the time of Proterozoic and Archaean periods.
Some of the symptoms that may be experienced by Shiela after a stroke affecting the frontal lobe will include;
- Difficulties in speech and language
- Muscle weakness that would be characterized by cases of incontinence
- Changes in personality and behavior (characterized by episodic periods of mood swings and outbursts, apathy, irritability)
- Reduced creativity and thinking capacity hence reduced capacity to solve problems.
This will result in an incomplete amino acid that will cause the function of the protein to change and also the shape of the protein to change.
