Fancy males

Fancy males

Multiple Choice

Which one is the male?

• Left

• right

Peacocks and Darwin

• The extravagance of the peacock was such a mystery to Charles Darwin, that he had to expand his theory of natural selection to include the concept of sexual selection.

Multiple Choice

Which is the male?

• Left

• Right

Sexual selection

• The theory of sexual selection says that traits that help organisms get more mates will pass those traits to the next generation.

• Its sometimes called "Survival of the sexiest"

Multiple Choice

Which one is the male?

• Left

• Right

Sexual dimorphism

• Sexual dimorphism happens when males and females of the same species look completely different

• This is a sign of sexual selection at work

Multiple Choice

Which one is the male?

• Left

• Right

Fancy females

• Sexual dimorphism doesn’t necessarily mean that males are more colorful than females.

• In Eclectus Parrots, females compete for nests while males compete for females who have the best nests. This competition has resulted in different but equally beautiful colors in males and females.

Multiple Choice

Which one is the male?

• Left

• Right

Size and ornaments

• Colors or dances are not the only way sexual selection works.

• In some cases like in the white tail deer, the males are larger and have ornaments that help them fight over territory and over females.

Multiple Choice

Which one is the male

• Left

• Right

The healthiest survive

• Being attractive requires lots of energy, and can even lower the chances of survival.

• Sexual adaptations make organisms more obvious to predators,

• Only the healthiest survive

Multiple Choice

Which one is the male?

• Left

• Right

Monogamous

• In species where the males and females do the same work raising babies or are monogamous, sexual selection is not that strong.

Multiple Choice

Which one is the male?

• Left

• Right

Where are the fancy females?

• For many females it is better to be camouflaged, whether to hunt or avoid becoming prey.

• They need to survive to raise their offspring

Multiple Choice

Why do monogamous species are not that affected by sexual selection?

• The males do all of the work

• Both sexes do the same work

• Females do all of the work

Multiple Choice

Which animal made Darwin create his theory of sexual selection?

• Peacock

• Birds of Paradise

• Lions

• Galapagos Finches

Multiple Choice

What is sexual dimorphism

• When males and females from the same species look the same

• When males and femalesfrom the same species look different

Multiple Select

Disadvantages of sexual adaptations

• Being more obvious to predators

• It prevents organisms from finding a mate

• Requires lots of energy

• Limits the amount of food available

Multiple Choice

Which one is the male?

• Left

• Right