What equals to 12 g into mg and 12 grams into ng? same for the second

Which of the rock examples below is most likely to be metamorphic

How do water’s relative densities as a solid and a liquid differ from that of most other substances? water’s solid and liquid forms have different densities, while most other substances have solid and liquid forms with similar densities. water’s solid and liquid forms have similar densities, while most other substances have solid and liquid forms with different densities. water’s liquid form is less dense than its solid form, while the opposite is true of most other substances. water’s solid form is less dense than its liquid form, while the opposite is true of most other substances.

Which step is the same in both forms of fermentation, as well as in cellular respiration?