Unit 7: Natural Selection

Based on the data, the change in average beak depth between 1976 and 1978 is best explained by

This scenario is best classified as an example of which type of natural selection?

The drastic reduction in population size from 1,200 to 180 birds could also result in

What is the change in average beak depth (in mm) between 1976 and 1978? Express your answer to two decimal places.

Which of the following is required for natural selection to occur?

Homologous structures in different species provide evidence for evolution because they suggest

The wings of a butterfly and the wings of a bird are examples of

A population of moths on an island has two color morphs: light and dark. If a volcanic eruption covers the island's trees in dark ash, which outcome is most likely based on natural selection?

Genetic drift is most likely to significantly affect allele frequencies in

The founder effect is an example of

Which of the following provides the raw material for natural selection?

The results of this experiment best support which of the following conclusions?

When the 5 surviving colonies were transferred to a new antibiotic plate and all grew successfully, this result demonstrates that

Based on this experiment, which of the following practices would most accelerate the evolution of antibiotic-resistant bacterial populations?

Speciation that occurs when a population is divided by a geographic barrier is called

Which of the following is an example of a prezygotic reproductive barrier?

Darwin's theory of evolution by natural selection was influenced by the observation that

The evolution of similar body shapes in sharks (fish), dolphins (mammals), and ichthyosaurs (extinct reptiles) is an example of

In a population of 1,000 organisms, 360 show the recessive phenotype. Assuming Hardy-Weinberg equilibrium, what is the frequency of the heterozygous genotype? Express as a decimal.

Based on the phylogenetic tree, which two species share the most recent common ancestor?