Question

please don't answer unless you know the right answer:

1.) Cyanobacteria can cluster together into colonies called _______, with some discovered in Western Australia that are 3.5 billion years old.
2.) Cyanobacteria produce oxygen and convert sunlight to energy using _______.
3.) Plants and arthropods did not make the transition to land until near the end of the _______ Period.
4.) Diverse multicellular eukaryotes did not appear until the _______ period.
5.) A large multicellular eukaryote requires more _______ to survive than a single-cell eukaryote.

Respond to the following based on your reading.

6.) Describe the biological chemical processes that are responsible for producing oxygen in Earth's atmosphere, eventually leading to the Cambrian Explosion.
7.) Explain the importance of oxygen in the evolution of large multicellular animal life.

Answer 1

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Answer 2

Answer:

2. Photosynthesis.

I only understand this question sorry....