Text:

Match the words below with the phrases in italics which have a similar meaning. There are two extra words. Words: gene; mate; offspring; organ; paper; proof 1. Despite many studies, scientists have yet to find evidence that the condition can be inherited: gene 2. Many species of bird stay with the same partner for their whole adult lives: mate 3. The liver is an internal body part that is capable of regenerating itself to some extent: organ 4. An important academic article recently showed that we share more of our DNA with reptiles than we once thought: paper