Ligers grow at a rate of 2.2 pounds every second day, thus by the end of their first year, they can weigh up to 364 pounds. Ligers are the subject of a video the looks at hybrids and shows viewers how speciation can occur via allopatric and sympatric speciation. 

Concepts

speciation, species, reproductive isolation

Show More Show Less

Additional Tags

science

Show More Show Less

Instructional Ideas

• Pause video after allopatric speciation discussion so pupils can take notes, ask questions
• Pause again after sympatric speciation
• Have learners research different examples of speciation and present to class

Classroom Considerations

• The narrator uses some interesting language, for example bump uglies for reproduction, kick ass, and getting it on process, which may not be appropriate for your students
• Video 15 in a series of 40

• This video is hosted on YouTube

Pros

• Video includes a table of contents, making t easy to show only certain clips
• Shares interesting information about the Grants' research on finches in the Galapagos

Cons

• Language may not be appropriate for the classroom

Common Core

RST.9-10.4