#Question id: 9227
#Unit 9. Diversity of Life Forms
A land developer and several ecologists are discussing how a parcel of private land should be developed with housing while saving 20 hectares as natural habitat. The land developer suggests that the 20 hectares be divided into 20 separate 1-hectare areas, spread out across the area. The ecologists suggest that it would be better to have one intact parcel of 20 hectares on one side of the larger area. What is the significance of these different arrangements of the 20 hectares?
#Question id: 9225
#Unit 9. Diversity of Life Forms
Use the following figure to answer the question
In looking at the species-area plot in the figure, what can be concluded?
#Question id: 9215
#Unit 9. Diversity of Life Forms
Use the following figure to answer the question
Five new individuals were added to a small population of bighorn sheep in 1986, and ten more were added between 1990 and 1994. According to the figure, what occurred in this population after these additions?
#Question id: 9207
#Unit 9. Diversity of Life Forms
Loss of biodiversity matters not only with regard to mammals or other vertebrates, but also microbes. Why are microbes worthy of discovery and protection from extinction?
#Question id: 9203
#Unit 9. Diversity of Life Forms
The human impact that scientists determined has caused the most extinctions on record is ________, and beyond further losses from this impact, the other impact with the largest potential to cause future extinctions is ________.
#Question id: 9201
#Unit 9. Diversity of Life Forms
Erwin and Scott used an insecticidal fog to knock down insects from the top section of a L. seemannii tree. The researchers identified over 900 species of beetles among the individuals that fell. Erwin also projected that this entire tree from top to bottom is host to about 600 arthropod species that are unique to this tree species and not found on any other tree species. There are approximately 50,000 species of tropical trees. Although it could not be entirely accurate, what would be the best way to estimate the total number of arthropod species?