Homologous structures, such as a bat wing and whale flipper,?

a. are formed from genes on the same pair of chromosomes.


b. are similar externally but have different basic structures and were probably not derived from a common ancestor.


c. are the result of pairs of chromosomes that are identical in bats and whales.


d. have the same underlying structure due to inheritance from a common ancestor.


e. are structures that did not develop in response to natural selection.

Homologous structures, such as a bat wing and whale flipper,?
Definitely B
Reply:The correct answer should be D (homology correspond to the family of genes and structures that evolved from a common ancestor) like the various forms of haemoglobins.





B would be the definition of convergent evolution, like the birds' bats' wing or the fins in fish and whales: something that evolved separately but along similar line due to a similar evolutionary pressure.
Reply:I'd say D.





Then again, I kinda forgot what homologous means. lol!
Reply:It's definitely D. This shows a common ancestor with changes in underlying structure due to environment.