If a rock sample began with 1000 atoms of radioactive uranium, how much parent material (uranium) would remain after 13.5 billion years,
assuming that it decays at a steady rate? Describe exactly how you solved
this problem.

Explain why in any given geographical region, women tend to have lighter skins( by 3-4% on average) than men?

To determine if a particular plant is homozygous or heterozygous, you would have to test cross with a

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.