The second largest crater in the world was formed by the impact of a comet according to a 2014 study by researchers in Canada and Ireland. Colliding with Earth almost 1.85 billion years ago, the estimated diameter of the crater is 81 miles (130 km).
How big is a bacteria compared to a human cell? The size of a typical bacterial cell is 0.5-5.0 micrometers, a average human cell is 10 micrometers.8 people found this useful.Edit.he consensus among biologists is that only 5 to 10% of the trillions of cells in our bodies are human. The rest are alien cells: yeast, fungi, bacteria, viruses.
Bacterial cell wall feature has features useful for classification. check out:â Differences between Bacterial cell and Human cell. Staining: Cell wall of bacteria differs based on the layers in it. Gram stain is used to classify these bacteria based on the variation in the layers. This bacterial cell wall is made of 3 materials in general viz. carbohydrates, proteins (peptidoglycan) and lipids (lipopolysacharide). But there is variation in the quantity of peptidoglycan and lipopolysaccharides ratio among them.