1. Introduction to Biology

Which of the following statements about secondary succession is correct?

Darwin concluded from his observations of nature and readings that:

Which of the following is NOT an example of a trade-off that would constrain evolution?

The major contribution of sex to evolution is that __________.

If a species is suddenly introduced into a new habitat, which of the following is most likely to occur according to the principles of natural selection?

How did some stickleback populations come to live exclusively in freshwater environments?

How did Jean-Baptiste Lamarck propose that species change over time?

What type of traits does sexual selection tend to favor?

Which of the following is an example of artificial selection?

Which principle states that two species in the same habitat cannot occupy the same niche indefinitely?

Which of the following best describes the main selective pressure that favored the evolution of darker skin color in human populations?

Which of the following is an example of descent with modification?

Which of the following best describes directional selection in the context of natural selection and evolution?

Which of the following types of evidence is most important when determining whether a trait is an adaptation?

Why do invasive species pose such a threat to native ecosystems?