In cats, the bones in the legs involved walking are very similar to the bones of whales’ flippers that are involved in swimming. These are examples of Vestigial structures
Analogous structures
Endosymbiosis
Homologous structures

If a robot fixed another robot is it a engineer or doctor?

How are mutations continually being generated in a population (what are some of the causes of mutatuions? ) explain

Which statement best describes the relationship between an allele and a gene? question 1 a. an allele is a variation of a gene that can be expressed as a phenotype. b. an allele is the part of a gene that attaches to messenger rna molecules. c. an allele is a segment of a dna molecule that controls replication of a gene.