How does natural selection affect a single gene trait 17.2?

What the theory that the sun goes around earth was replaced with the theory that earth goes around the sun this was an exaple of a

Iguanas need to live in a habitat that is very warm, so the pet store warms their enclosures with "basking lights" which act as an artificial sun. describe how the three methods of thermal energy transfer may take place within the iguana's enclosure.

Which of these is not a nucleotide base found in dna?