How can scientists practice ethical lad behavior

There is no set in stone way they should practice ethical lab behavior. It is just  encouraged through there schooling and what they learn to be the right and wrong way through traditions, and shown through past successful scientists from discussion, examples and informal education.

i think that it is plants

in the year 2850, humans successfully colonized mars. the martian modules that were constructed could hold only a small population of people. it is now a century later, and the population on mars has grown to 600 people. of the current mars population, 45 people express the recessive phenotype for phenylketon- uria (pku) syndrome (pp genotype).

explanation: