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:
vaccination
Explanation:
The vaccination has been one of the most revolutionary inventions in the medical field. This invention helped protect people from numerous diseases, some being totally neutralized, while some having only minor effects on the human body. The vaccination basically is a way of enhancing the immune system of the body by injecting in it a weakened form of the pathogen. In this way, the weakened form of the pathogen is not capable to harm the body, and the body is not fighting against it, but instead the pathogen becomes part of the body and its defense mechanism, so when the pathogen strikes, the body has a counter attack and defeats it.
Answer:
D
) ratio of neutrons to protons in each element.
Answer:the word is not marma ok it karma ok
Explanation:I must saturate myself with repose and with the underlying—with Karma.
Karma is the Law of the Universe, the expression of divine Will.
And what have ye done to Karma, that he is so wet and silent?
How can one substitute here a sameness of Karma for identity of soul?
I soon discovered that, no matter how the wheel is turned, the Karma or merit is equal.
Equally unsatisfying is the statement that phenomena are aggregates of Karma.
