Answer: The correct answer is-
C.They replaced carbon dioxide with oxygen in the atmosphere.
Cyanobacteria ( also known as blue green algae) is a large phylum of bacteria that is capable of synthesizing its own food using carbon dioxide and water in the presence of sunlight ( photosynthesis).
They contain a green pigment called chlorophyll that absorbs energy from sunlight and helps in the formation of food ( glucose). They release oxygen as a byproduct in the atmosphere.
As these organisms utilize carbon dioxide ( that is present in the atmosphere) to give oxygen in return, therefore, they affected early atmosphere of Earth by replacing carbon dioxide with oxygen.
Thus, option C) is the right answer.
To power equipment (like defibrillators). To isolate compounds that have potential to be drugs in the early stages of research. To manufacture drugs on a large scale. To produce models on a computer to predict how a drug will behave in the body or under certain conditions.
It will be either C or D but I’m some what sure it would be letter c
Answer:
the branch of science concerned with classification, especially of organisms; systematics.
Explanation:
