8th Grade Science Checkpoint -Study Guide
Quiz by Ms. Foskey
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27 questions
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- Q1What type of mutation occurs when one gene is replaced by another?DeletionSubstitutionTranscriptionInsertion30s
- Q2A scientist discovers a mutation in a species of fish that makes them more resistant to disease. What type of mutation would this be considered?BeneficialDeletionInsertionSubstitution30s
- Q3If a mutation causes an albino trait in cats, how might this affect their survival in the wild?Make them more vulnerable to predatorsIncrease their ability to camouflageMake them less visible to predatorsIncrease their hunting ability30s
- Q4What type of mutation occurs when an extra gene is added to a DNA sequence?InsertionTranscriptionDeletionSubstitution30s
- Q5A recipe calls for baking soda, but a baker accidentally adds salt instead. The cake turns out flat and dense. What type of mutation does this model represent?SubstitutionDeletionInsertionTranscription30s
- Q6What is the process by which traits that improve survival and reproduction become more common over time?Natural selectionEvolutionAdaptationMutation30s
- Q7Why did gray frogs become more common when the environment was gray?The frogs learned to change colorThe frogs blended into the environment, reducing predationThe frogs ate more foodThe frogs population size increased randomly30s
- Q8What type of adaptation would help a desert plant survive in its environment?Brightly colored flowers to attract predatorsLarge roots to store waterWeak stems to avoid breakingThin leaves to capture more sunlight30s
- Q9A population of moths became darker over time as pollution darkened the trees they rested on. What caused this change?Natural selectionArtificial selectionGenetic driftMutation only30s
- Q10What term describes a trait that improves an organism's chance of survival and reproduction?MutationEvolutionVariationAdaptation30s
- Q11What is the primary evidence that organisms have changed over time?Comparative anatomyNatural selectionFossil recordDNA evidence30s
- Q12Why are pelvic bones in whales considered evidence of evolution?They are necessary for balanceThey suggest that whales evolved from land-dwelling ancestorsThey are vestigial with no evolutionary significanceThey help whales swim30s
- Q13Fossil evidence shows that ancient horses were much smaller than modern horses. What does this suggest about their evolution?Horses became larger due to environmental changesHorses evolved faster than other speciesHorses adapted to a forest environmentHorses have always been the same size30s
- Q14What term describes the preserved remains or traces of ancient organisms?MutationAdaptationFossil recordEvolution30s
- Q15What type of structure shows that different species have a common ancestor?HomologousAnalogousVestigialDivergent30s