What is the role of the MCR1 gene in determining a populations fitness for survival???please help it’s do today

How would you describe the the organisms in the second row of model 1 that are connected to the parents by a line

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.

Why should organisms reproduce more offspring than will survive? select all that apply.