Evolution - Clip

In northern Malaysia, reptile expert Lee Grismer investigates the evolution of the Langkawi bent-toed lizard. Originally forest dwellers, some lizards moved to nearby caves, adapting to their new environment over time. These adaptations include smoother skin and longer legs, aiding their movement on cave walls. Further research confirms the emergence of a new species, illustrating evolution in action and reminding us that it continues to occur around us.

What is the primary habitat of the Langkawi bent-toed lizard?

• Rivers

• Mountains

• Deserts

• Forests

Why did some Langkawi bent-toed lizards move to caves?

• To find mates

• To escape predators

• To avoid humans

• To find more food

What evolutionary changes were observed in the cave lizards?

• Shorter tails

• Larger eyes

• Brighter colors

• Smoother skin and longer legs

What does the discovery of the cave lizard species demonstrate?

• Extinction of species

• Static nature of evolution

• Reversal of evolution

• Ongoing evolutionary processes

How do the longer legs benefit the cave lizards?

• They help in swimming

• They make them faster runners

• They allow them to dig better

• They aid in climbing cave walls