Natural Selection Flashcard

Front

At which level does evolution happen?

Back

Population

Front

The type of genetic drift that follows the colonization of a new habitat by a small group of individuals is called?

Back

The founder effect

Front

Frogs with longer tongues are able to catch more food. Frogs with short tongues can't catch as much food and don't usually survive. What type of selection is this an example of?

Back

Directional Selection

Front

In sunflowers, being too short means not getting enough sunlight. Growing too tall means getting blown around by the wind. Medium height sunflowers tend to survive the best. What type of selection is this an example of?

Back

Stabilizing Selection

Front

Evolution works by ________________.

Back

Small changes pass down through many generations.

Front

What is natural selection?

Back

Natural selection is the process where organisms better adapted to their environment tend to survive and produce more offspring.

Front

What is genetic drift?

Back

Genetic drift is a mechanism of evolution that refers to random changes in the frequency of alleles in a population.

Front

What is the Hardy-Weinberg principle?

Back

The Hardy-Weinberg principle states that allele and genotype frequencies in a population will remain constant from generation to generation in the absence of evolutionary influences.

Front

What is stabilizing selection?

Back

Stabilizing selection is a type of natural selection that favors average individuals in a population.

Front

What is disruptive selection?

Back

Disruptive selection is a type of natural selection that favors individuals at both extremes of the phenotypic range.