Quiz 4 Review - Fossils, Embryology, Relative/Absolute Datin

What is the law of superposition?

• The age of sedimentary rock not found in the original layers.

• Metamorphic rock is younger than the nearby igneous rock.

• Sedimentary rock in it's original position is older than layers above it.

• Metamorphic rock is older because it was deposited to nearby sedimentary rock.

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What are the relative ages of the features in order from oldest to youngest?

• Limestone, Basalt, Fault, Siltstone

• Siltstone, Fault, Basalt, Limestone

• Limestone, Fault, Basalt, Siltstone

• Limestone, Siltstone, Fault, Basalt

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How does sedimentary rock usually form?

• Vertically

• Folding

• Diagonally

• Horizontally

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What is the correct order of the rock layers from oldest to youngest?

• B, C, D, E, A

• E, D, C, B, A

• A, B, C, D, E

• B, C, D, A, E

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What is an embryo?

• An early stage of development of a multicellular organism.

• A sex cell that begins to grow and diversify.

• The genome of an organism before birth.

• The fluid sac surrounding a developing organism in its earliest stages.

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What is comparative embryology?

• Compares embryos of different species, showing how all animals are related.

• Medical research that uses embryonic stem cells.

• The study of environmental influences on embryos.

• The act of sequencing DNA of embryos.

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The most recent ancestral form or species from which two different species evolved is known as ________________________.

• a common ancestor.
• an embryonic stage.
• development.
• evolution.

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Common ancestry relates to evolution because

• evolution only happens when there are common ancestors.
• Common ancestors make evolution happen more quickly.
• evolution can never take place with common ancestors.
• the more two organisms have in common, the more recent is their common ancestor during their evolution.

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In the the third embryonic stage (bottom row), mammal embryos _____

• have more characteristics in common with each other than with reptiles or birds.
• are still hard to tell from reptiles and birds.
• have the same features as fish, reptiles, and birds.
• do not have tails.

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How is comparative embryology used as evidence for evolution?

• The similarities in development across organisms show how they are related.

• The development of embryos shows evolution occurring in organisms before birth.

• The similarities of embryos shows that all organisms used to once look like each other.

• Comparative embryology is not used as evidence for evolution.

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