The geographic distributions of wolves and coyotes often do not overlap. A study of wolves and coyotes in an area where they do overlap found that the two species minimized competition by differential use of food resources. Wolves preyed primarily on elk and a few deer, whereas coyotes preyed mostly on deer and rarely on young elk. Coyotes also scavenged abandoned wolf kills. Wolf and coyote behavior illustrates which type of competition?

Which BEST describes why it is important for us to understand how things are measured with the SI system?

Fungi are like algae in that fungi are classified primarily on the basis of their colors.

An example of a trait controlled by multiple alleles is  

A large area is deforested and remains bare. The loss of evapotranspiration from this forest will likely leave the regional climate

Sister chromatids of each chromosome move apart  and end up at opposite spindle poles during _______. 

Which of the following is a gastropod?

Amoebas, foraminiferans, radiolarians, and heliozonas are all classified as _____.

Following a line of longitude from the equator along the west coasts of the United States and Canada and to the North Pole, a person would pass through biomes in which order?

During succession, two plant species become established at different times. Species A is a perennial with roots that secrete chemicals to maintain a distance between members of the species and similar species. Species B is a low-growing annual with nitrogen-fixing bacteria in its root nodules. Which (if either) of these two species most likely appears first during succession, and why?