DNA and Evolution

Evolution is best defined as:

• the process which organisms die.

• the process which organisms change over time.

• the process which organisms that are extinct become revived.

• the process which non-living things fossilize.

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The solidified remain or imprint of a once living thing are called:

• Fossils

• Homologous Structures

• Vestigial Structures

• DNA

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What type of evidence for evolution is represented in the picture above:

• Fossils

• Vestigial Structures

• DNA

• Homologous Structures

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How does embryology support the Theory of Evolution?

• It shows that they have a common ancestor because of their similarities.

• I'm not sure.

• Animals change over time.

• it does what now

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In stage one (top row) of these embryos, most of the embryos________

• look very similar.
• have very different features.
• show different stages of development.
• have only a tail if they are non-human.

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The similarities of the bones in the diagram provide evidence that---

• The organisms shown lived in the same natural envionrment
• The organisms shown may have developed from a common ancestor
• The organisms shown have the same genetic diseases
• All vertebrate species have identical forelimbs

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According to this cladogram, sharks are MOST closely related to which organism? 

• Amphibians
• Ray finned fish
• Crocodiles
• Birds

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For evolution to happen, this has to occur first:

• an organism finds a new mate
• and organism's DNA changes
• The environment in which a species lives changes
• the population increases

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Changes in species that allow that species to survive changes in the environment are called:

• ecosystems
• adaptations
• biomes
• alleles

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What are the nucleotides made of?

• Sugar, Phosphate, nitrogen base
• Phosphate, Adenine, nitrogen base
• Thymine, Adenine, Cytomine
• Phosphate, Nitrogen, Adenine