Evolution Review

The theory of evolution by natural selection means that what is changing over time?

• The inherited traits of a population.
• The acquired traits of a population.
• Hair color and eye color
• Attractive features.

Tags

NGSS.MS-LS4-2

NGSS.MS-LS4-4

New variations of genes in a population is due to-  

• Mutation and adaptations
• Mutation, genetic recombination during meiosis, and sexual reproduction
• rtificial selection and natural selection
• Founder effects and sexual recombination

Evolution is often described as “survival of the fittest.”  How would biologists best   measure fitness from the perspective of evolution?   A

• Fitness is best measured by an organism's ability to find food and escape from predators.
• Fitness is best measured by an organism's speed and strength. These two characteristics are adaptive to most environments.
• Fitness is best measured by the ability to survive in the environment. This is the definition of adaptation. 
• Fitness is best measured by an organism's survival ability and its reproductive  success

According to this data, the unknown bacterial species is most closely related to: 

• Species I
• Species II
• Species III
• Species IV

Tags

NGSS.MS-LS4-2

A small population of seals was randomly caught to start a new population in the northwest Pacific   Ocean.  Which of the following statements would accurately describe the new   population?  

• The new seal population is genetically less diverse than the original population 
• The new seal population is genetically more diverse than the original population
• There is equal genetic variety compared  to the original population 
• None of the answers

This mechanism of evolution occurs when populations migrate.

• Extinction
• Gene flow
• Genetic drift
• Natural Selection

Structures with the same parts have different functions; suggests that organisms share a common ancestry

• vestigial structures
• homologous structures
• adaptive radiation
• fossil

Tags

NGSS.MS-LS4-2

Which of the following is true?

• Gene pool frequencies do not change as a result of migration in or out of a population.
• Gene flow occurs only as a result of isolation of a small population.
• Gene flow can cause new alleles to enter a population's gene pool.
• Gene flow is due the the selection of the most favorable traits.

Genetic drift is change in the allele frequency of a population due to...

• random chance
• natural selection
• non-random mating (sexual selection)
• artificial selection

Some organisms that share a common ancestor have features that have different functions, but similar structures.  These are known as

• vestigial structures
• analogous structures
• homologous structures
• fossil structures

Tags

NGSS.MS-LS4-2