Author: Anonymous

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Deserts typically occur in a band around 30 degrees north and 30 degrees south latitude because

With respect to the sun, Earth normally rotates once in a 24-hour period. What would be the effect on climate in the temperate latitudes if the rotation increased to 48-hours?

Which of the following processes occurs first in order to begin speciation?

Which of the following ecosystems would likely have a larger net primary productivity per hectare (10,000 m2), and why?

To become bound to hemoglobin for transport in a mammal, atmospheric molecules of oxygen must cross

On the Bahamian island of Andros, mosquitofish populations live in various now-isolated freshwater ponds that were once united. Currently, some predator-rich ponds have mosquitofish that can swim in short, fast bursts; other predator-poor ponds have mosquitofish that can swim continuously for a long time. When placed together in the same body of water, the two kinds of female mosquitofish exhibit exclusive breeding preferences. Which two of the following have operated to increase divergence between mosquitofish populations on Andros? improved gene flow bottleneck effect sexual selection founder effect natural selection

Three forest areas are being considered for a conservation reserve. Each area contains the same number of trees and is the same cumulative size. The area surrounding the forest patches is a mix of agricultural land and residential homes. Which area(s) would be most suitable for conserving amphibians, which are highly susceptible to a pathogenic (disease-causing) chytrid fungus?

The figure above represents a pedigree for a family in which dark-shaded symbols represent individuals with one of the two major types of colon cancer. Numbers under the symbols are the individuals’ age at the time of diagnosis. A slash through the symbol indicates that the individual is deceased. From this pedigree, what is the most likely manner by which this trait is inherited?

Rain falls on a fertilized agricultural field after a farmer has harvested the corn. Which biogeochemical cycles are involved when runoff from the field flows into a nearby stream?