Which of the following is true about quantitative survey research designs? Question 8 options: They cannot produce precise estimates. It is easy to collect in-depth data using quantitative research designs. Concepts and relationships that are not directly measurable cannot be studied using quantitative research designs. They facilitate advanced statistical analysis.

Which of the following observation darwin shape his concept of descent with modification? a) species diversity declines farther from the equator. b) fewer species live on islands than on the nearest continents. c) birds live on islands located farther from the mainland than the bird's maximum nonstop flight distance. d) south american temperate plants are more similar to the tropical plants of south america than to the temperate plants of europe. e) earthquakes reshape life by causing mass extinctions.