Homework Help

Are turtles more closely related to lizards or mammals?  Why? Please answer...

user profile pic

leila22 | Student, Grade 10 | (Level 2) eNoter

Posted March 8, 2012 at 6:51 PM via web

dislike 0 like

Are turtles more closely related to lizards or mammals?  Why?

 Please answer specifically and detailed.


2 Answers | Add Yours

user profile pic

jgeertz | College Teacher | (Level 1) Associate Educator

Posted March 9, 2012 at 1:52 AM (Answer #1)

dislike 1 like

Scientists have debated for years where turtles belong on the evolutionary map. It is one of the hottest questions in the field of systematics. Using turtles' genes, some scientists have insisted  turtles belong to the group of animals that includes crocodiles and birds. Still others believe, based on physical characteristics, that turtles are more closely related to lizards. The issue may now be solved. Using groundbreaking new microRNA techniques, the evidence reveals that turtles are indeed evolutionary cousins to lizards. Paleobiologists compared microRNA of an anole lizard to the western painted turtle and American alligator. Results show that some of the lizard microRNA was present in the turtle but absent in bird, crocodile and other mammal microRNA. MicroRNA provides a molecular map of a species evolutionary past.


user profile pic

pranitingale | Student, Grade 9 | (Level 1) Valedictorian

Posted March 9, 2012 at 2:03 AM (Answer #2)

dislike 1 like

a). RELATION BETWEEN LIZARDS & TURTLES * both are reptilian * triploblastic body * billateral symmetry * dry scales on body * oviparous animals * cold blooded animal * lungs for respiration * 3 chambered heart b). RELATION BETWEEN MAMMALS & TURTLES (REPTLIA) * well developed organs are present * triploblastic body * billateral symmetry * internal skeleton * true vertibal column * both found on land and water.

Join to answer this question

Join a community of thousands of dedicated teachers and students.

Join eNotes