Arrange these groups in the order that they first appear: birds, reptiles, amphibians, dinosaurs, fish.

(a complete sentence is not required)

a. by using fur or clothes to trap heat energy near the body

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: