Evidence for Evolution- Stated Clearly Video

What is the first claim that evolution makes?

• All living things are related and have a common ancestor.

• All living things are related, except humans

• Humans evolved from monkeys.

• Living things are unrelated.

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How does the evolution of living things occur?

• by magic
• no one knows
• by natural selection
• by asexual reproduction

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To what group do whales, dolphins and porpoises belong?

• fish
• cetaceans
• crustaceans
• cephalopods

From what do scientists believe cetaceans evolved?

• megladons
• organisms don't evolve
• a 4-legged land mammal
• a fish that also lived on land

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What characteristics do whales and dolphins share with other land mammals (check all that apply)?

• They breathe air with lungs.
• They produce milk for their young.
• They have placentas and give live birth.
• They are endothermic (warm-blooded).

What do the skulls of dolphins reveal about their blowholes?

• They are actually gills.
• They are used to help attract mates.
• Only the dolphins' skin keeps their brains in place.
• They resemble two nasal passages like those in land mammals.

True or False: The bones found in the forelimb (front arm) of whales are similar to those found in humans, hippos, and even bats.

• True
• False

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What term describes anatomical features that no longer serve a purpose in the current organisms but may have been important to a common ancestor in the past

• vestigial structures
• extant appendages
• extinct appendages
• homologous structures

Both human and dolphin embryos show leg buds at similar points in development. What happens to the leg buds in a dolphin embryo as it continues to grow?

• They continue to grow into legs.
• They continue to grow and develop into back fins.
• Dolphins hatch from eggs and do not have leg buds.
• They stop developing and disappear as the dolphin develops.

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What similar feature does an early dolphin fetus share with human and dog fetuses?

• gills on the side of the body
• blowhole on the top of the head
• nostril grooves on the front of the face
• tailbones that disappear in late embryonic development

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