What is the ability to change color to avoid predators?

What are some possible short and long term medical concerns for crew members on longer space exploration trips

Which part of the cell is affected by the movement of molecules through diffusion, osmosis and active transport?

Agene pool: a) is the collection of all the alleles found in a single species b) is the collection of all the alleles found in a single population c) is the collection of all the chromosomes found in a single population d) is the collection of genes in a species that allow the individuals to swim