Sexual Selection

What is sexual dimorphism?

• Mate competition

• Mate choice

• Where male animals display certain mating behaviors

• Where the different sexes have different traits

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Flashy tails on many animals is an example of coloration. Why might flashy tailed animals display their colors to another of the same species? 

• make friends
• help build a nest
• attract a mate 
• scare predators

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The males of a bird species do a “dance” and “sing a song” each spring. What is the main purpose of these behaviors? 

• to scare off young birds
• to imprint young birds
• to clean their feathers
• to attract female birds

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The picture shows a male and female pheasant. What type of selection occurred for them to have these adaptations?

• Natural Selection

• Evolution

• Sexual Selection

• Random Selection

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A bird that can easily outcompete other birds for food and that can produce many eggs has a high ___________.

• IQ
• mutation rate
• fitness
• adaptability

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What is the advantage of having different shaped beaks?

• To look different from other species.
• To be able to eat the food readily available in the environment.
• To protect itself against predators.
• To protect itself against prey.

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Why are advantageous traits more likely to be passed onto offspring?

• Because they are more likely to survive and reproduce.
• Because they come from dominant alleles.
• Because they come from recessive alleles.
• Because the trait is an acquired phenotype.

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The differences among a species, like different bird beaks, are called

• genes.
• variations.
• traits.
• theories.

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Why is the mouse population changing over time?

• The light mice can reproduce more successfully than the dark mice
• The hawks eat more dark mice than light mice because the dark mice taste better
• The hawks eat more light mice than dark mice because they can see the light mice more easily
• The hawks eat more dark mice than light mice because they can see the dark mice more easily

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"Organisms that are better adapted to the environment survive to pass traits to their offspring" is the definition of

• Natural Selection

• Evolution

• Selective Breeding

• Artificial Selection

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