Heterocyst-forming cyanobacteria differentiate highly specialized cells to provide fixed nitrogen to the vegetative cells in a filament. In the presence of a source of combined nitrogen such as nitrate or ammonium, Anabaena PCC 7120 grows as long filaments containing hundreds of photosynthetic vegetative cells.
Answer:
D) Shingles
Explanation:
Shingles(herpes zoster) is a viral infection of a nerve and its surrounding skin. The causative organism is the varicella-zoster virus.
Its symptoms include fever, general weakness, pain, hot sensation, rash begins to occur with red blotchy patches on one side of the skin.
Answer:
The first person to observe cells was Robert Hooke. Hooke was an English scientist. He used a compound microscope to look at thin slices of cork.
Explanation:
Sorry if I am wrong let me know if I am.
