Hummingbirds sometimes enter short periods of low metabolic activity known as 

In the desert, plants and animals have developed similar mechanisms for collecting or conserving water.  Texas horned lizards and foxtail plants [1] Sandgrouse and creosote bushes [2] Camels and seguaro cactus [3]

In deep sea communities, the producers are [producers] that get their energy from [energy]

As water evaporates, it [evap] As water freezes, it [freeze]

Turner and Trexler studied the relationship between body size and fecundity in darter fish. Larger species produced [number] eggs than smaller species. In general, species that laid more eggs had [size] eggs than species producing fewer eggs.

dN/dt = rmaxN [(K – N)/K] represents

Which describes the effect of high altitude on temperature?

Which of the following is not a hypothesis that was proposed to explain population dynamics of lynx and snowshoe hares?

Which factors contribute to an individual’s inclusive fitness?

Which barnacles would you expect to find in the upper intertidal zone?