Mechanisms of Evolution

As it relates to evolution, what is a mechanism?

• a piece of metal in a machine

• a punnet square showing a cross between two parents

• a cladogram showing evolutionary relationships

• process by which something takes place or is brought about

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The process by which organisms that are better adapted to their environment tend to have greater survival and reproductive success is called

• allele frequency

• natural selection

• mutation

• gene flow

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Which of the following is NOT an example of natural selection? 

• People selectively breeding hamsters.
• Insect populations developing resistance to certain pesticides.
• Bacteria becoming resistant to antibiotics.
• Male birds of certain species developing colorful feathers to attract female mates.

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This picture is an example of which type of selection?

• Artificial Selection

• Natural Selection

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Heritable traits that are better matched to the environment than others are referred to as

• adaptations

• mutations

• allele frequency

• random selection

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A(n) ___________________ is one of the possible forms of a gene.

• adaptation

• phenotype

• mutation

• allele

A(n)________ is a measure of how common a certain allele is in a population.

• Allele Frequency

• Gene Pool

• Genotypical Number

• Genetic Drift

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a type of reproduction which involves the fusion of gametes

• binary fission

• asexual reproduction

• sexual reproduction

• meiosis

The image above shows how ___________ can be recombined, leading to an increase in genetic variation.

• genes

• mutations

• adaptations

• fitness

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What is the greatest advantage of being a sexual organism?

• All offspring are genetically different and can survive a new virus, bacteria or environmental change

• All offspring are genetically identical and can survive a new virus, bacteria or environmental change

• If one dies they all die

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