Astructure made up of two or more kinds of tissues that perform a special function is an

Organ. They do many special things that help us work right. Hope this helps.

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: