Primavera Biology B Unit 4 Exam

What does the Hardy-Weinberg principle state?

Allele frequencies in a population remain constant unless forces cause the frequencies to change.

Which option correctly describes how Earth's temperature has changed during its history?

Earth was initially very hot. It gradually cooled down.

Which options describe Darwin's theory of natural selection? Select all that apply.

Evolution occurs because of natural selection. Natural selection results in descent with modification.

How does polyploidy cause speciation?

Polyploidy is a mutation. The individual with the mutation can reproduce and form a new species.

What is true about prey in large groups?

Prey in the middle of the group are relatively safe.

What summarizes the RNA world hypothesis?

RNA was the first biomolecule to evolve and did so before DNA and proteins.

Study the image. https://assets.learnosity.com/organisations/625/asset/media/1170419 What can be interpreted from this cladogram?

The dodo is most closely related to the spotted dove.

Which of the following can scientists learn about from studying fossils? Select all that apply.

cellular structure how extinct organisms moved

Study the histogram. https://assets.learnosity.com/organisations/625/asset/media/1204565 What form of natural selection does the histogram show?

directional selection

The assumptions of the Hardy-Weinberg principle can be causes of evolutionary change. What are some assumptions that cause evolutionary change? Select all that apply.

genetic drift gene movement nonrandom mating

Structures that develop from the same type of embryonic tissue but take on different forms and functions when the organisms fully develop are called _[blank]_.

homologous structures

The same section of DNA is compared in different bird species. Which type of bird is most closely related to the woodpecker?

kingfisher

Organisms produce many young during their lifetime. This means that, if resources are available, populations increase over time. What process does this describe?

overproduction

Which theory suggests that life on Earth originated from microbes carried to Earth by meteorites or comets?

panspermia

In a phylogenetic tree, what does the distance between branches represent?

the amount of evolutionary change