I think it would be because the lizards were able to adapt from the environment. Environment adaptation.
For me I would have to go with C. They always have the same number and kinds of Chromosomes.
An example could be oil (olive, almond)
A tiny solid suspended in the athmosphere
Adenine pairs with thymine. They form complementary pairs withone another during replication of the parent strand, forming the complement strand. If thymine is present for 30% of the bases, then its complement, adenine, will also be present in 30% of the bases.
