Answer: hierarchical
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Explanation:
Answer:
A blood stem cell transplant is used to treat patients with: multiple myeloma,lukemia and even anaemia.
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This is an example of mutualism. In mutualism, two organisms have a relationship which benefits both organisms. In this example, the butterflies benefit from food, and the flowers benefit by having their pollen spread.
Living organisms account for the significant increase in oxygen in the Earth's atmosphere 2 to 2.5 billion years ago (Option A). It was due to the emergence of cyanobacteria.
<h3>What are cyanobacteria?</h3>
Cyanobacteria, also known as blue-green algae, are microorganisms capable of performing photosynthesis.
Photosynthesis is a series of chemical reactions by which algae produce oxygen from carbon dioxide and solar energy.
Cyanobacteria are microorganisms that generated the current atmosphere with oxygen, which helped the development of life on the Earth.
Learn more about cyanobacteria here:
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