1. Introduction to Biology

Which of the following best explains how wolves are a keystone species in an ecosystem?

The similarity of the embryos of fish, frogs, birds, and humans is evidence of ______.

In a laboratory simulation of natural selection in insects, which factor would most likely increase the frequency of a particular trait in the population over several generations?

Sexual reproduction is important to the survival of a species in a changing environment because:

Which of the following best describes divergent evolution?

Which of the following is an example of a specialist species?

The construction of a beaver dam is an example of which of the following?

Which example best demonstrates the importance of having knowledge of evolutionary relationships?

Change in a population over time is called _____.

In a typical pond ecosystem, is a frog considered a secondary consumer?

Which statement best describes the mode of selection depicted in the figure showing individuals with intermediate phenotypes having higher fitness than those with extreme phenotypes?

Which of the following scenarios is the best example of natural selection?

Which time period experienced a significant reduction in biodiversity primarily due to habitat destruction caused by human activities?

Which term best describes the process in which species can no longer interact because they are separated by physical boundaries?

Which of the following best defines the term 'adaptation' in the context of evolution?