Patterns of Evolution How it works Natural Selection Evidence of evolution Speciation

Which type of selection is occurring in a cricket population that is changing from curved wings to flat wings? 100 points

Directional selection 100 points

The two types of genetic drift are the bottleneck effect and____________ 200 points

the founder effect 200 points

What process of natural selection favors the extreme phenotypes of a trait and eliminates intermediate phenotypes? ? 300 points

Disruptive Selection 300 points

The situation in which allele frequencies in the gene pool of a population remain constant is called 400 points

Hardy-Weinberg equilibrium 400 points

Double Jeopardy

A change in the _______ _______ exemplifies biological evolution.

Gene pool

The allele frequencies of a population are more likely to change if 100 points a. there are no disasters b. there is no gene flow c. mating is not random d. there are no mutations

Mating is not random 100 points

“Fitness” refers to what? 200 points

those individuals with favorable traits survive and reproduce 200 points

The cheetahs have very little variation in their population. This is due in part to an ice age thousands of years ago which drastically reduced their population and more recently, it is due to poaching and habitat loss. The cheetahs loss of variation occurred as a result of ________. 300 points

the bottleneck effect 300 points

Besides mutation, what else provides variation in a population? 400 points

sexual reproduction 400 points

A horse and a donkey can mate to produce a mule. The mule is sterile and cannot reproduce. Using thisexample, explain that a horse and donkey are NOT the same species. 500 points

To be the same specie the offspring must be fertile 500 points

What is the raw material of natural selection? 100 points

Variation 100 points

200 points If a mutation introduces a new skin color in a lizard population, which of the following would determine if the frequency of that new phenotype might increase

Fitness of the mutation for the environment. 200 points

If all of the alleles for a trait are equally favorable in the environment, what happens to natural selection for that trait? 300 points

The trait is not selected by natural selection. 300 points

If a cricket population is changing from curved wings to flat wings, which wing shape should be the fittest for the environment? 400 points

Flat wings 400 points

Daily Double

According to fossil evidence, whales evolved from 4-legged ancestors. The modern baleen whale has forelimbs, but inspection of its skeleton reveals only tiny vestigial hind limbs. What is the best explanation for this loss of hind limbs in the baleen whale? 500 points

Random chance and genetic drift led to the reduction in size of hind limbs.

Structures that no longer serve their original purpose in the body are called what? 100 points

vestigial 100 points

Penguin feathers and eagle feathers are structurally similar. Penguins need feathers for warmth while eagles use them in flight. These are _____________________structures. 200 points

homologous 200 points

Which of the following indicates a recent common ancestor? a.homologous structures b.analogous structures c. flight 300 points

homologous structures 300 points

Molecular evidence in support of natural selection includes 400 points

the universal code of DNA 400 points

According to the cladogram, ferns are most closely related to? 500 points

Flowering plants 500 points

What is require of offspring if the parents are to be considered to be the same specie ? 100 points

They must be fertile. 100 points

When a species includes organisms with a great deal of variation, what happens to the chances of survival after a catastrophe? 200 points

It improves the chances of survival. 200 points

Two species of lizard are separated by the formation of a wide river. Even when the climate changes and the river dries up, the two species do not interbreed. This is ______________ isolation. 300 points

geographical 300 points

The mating dance of the blue-footed booby creates __________ isolation with other species of birds. ? 400 points

behavior 400 points

In order for speciation to occur, What isolation MUST take place? 500 points

reproductive 500 points