Evidence of Evolution

What are the two main claims of the theory of biological evolution?

• All living things are related and evolution is powered by natural processes.

• All living things are related and evolution is driven by intelligent design.

• Evolution is powered by natural processes and species are unchanging.

• Evolution is driven by genetic mutations and environmental factors.

Which of the following characteristics do whales share with land mammals but not with fish?

• Living in water.

• Having gills.

• Being cold-blooded.

• Giving live birth and feeding milk to their young.

What skeletal features do whales possess that suggest a common ancestry with land mammals?

• A streamlined body shape for aquatic life.

• Gills for breathing underwater.

• Arm, wrist, hand, and finger bones in their flippers, and vestigial hind leg bones.

• A blowhole on top of their head.

What evidence from embryology supports the idea that dolphins evolved from four-legged land creatures?

• Dolphin embryos develop gills during early stages.

• Dolphin embryos initially have arm buds, leg buds, and nostril grooves on the front of their face.

• Dolphin embryos are born with fully developed blowholes.

• Dolphin embryos have a tail fin from the earliest stages.

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What was a possible function of the small, fully developed hind limbs found in Basilosaurid whales?

• Walking on land

• Steering in water

• Mating or scratching

• Digging for food

Which of the following is NOT a reason Maiacetus inuus is classified as a whale, despite having hip bones sturdy enough for walking on land?

• Its skeletons were found among fossils of sea creatures.

• Its teeth matched those of Basilosaurid whales.

• Its middle ear bones matched those of Basilosaurid and modern whales.

• Its diet consisted primarily of land plants.

What unique anatomical feature is shared by ancient walking whales and hippos, suggesting a common ancestor?

• Multi-chambered stomachs

• Internal testicles

• Double pulley ankle bones

• Absence of fur

The video presents multiple independent lines of evidence that collectively support which conclusion about whales?

• Whales are the oldest living mammals on Earth.

• Whales evolved from four-legged land mammals.

• Whales are more closely related to fish than to land mammals.

• Whales developed their unique features through random mutations without a common ancestor.