Stromatolites are rocky structures that generally form in shallow waters from the binding of sediment by microbial biofilms. Str
omatolites are typically hypothesized to be formed from the presence of cells that bind these grains together. If the appearance of the stromatolites in the fossil record were to indicate the emergence of life on earth, approximately how old are the oldest stromatolites on earth? A) 2.6 billion years old B) 3.6 billion years old C) 4.6 billion years old D) 400 million years old
Since the cell is in a shoebox, we can assume this cell is a plant cell. the balloon most likely represents the vacuole, which is the largest organelle in the plant cell. the marbles could represent ribosomes, but ribosomes aren’t the only round organelle so i’m not sure about that one.
