Two different populations of birds live in the same area and eat the same types of food. Which most likely describes the relationship between these two populations of birds?

What is the function of autotrophs in the carbon cycle?

What will most likely happen if the human population continues to grow at current rates?

Stranding occurs when a dead, sick or injured sea turtle washes up on the beach. Which statement best explains why 'stranding' should be reported immediately to local authorities?

The males of a bird species do a "dance" and sing a song each spring. What is the main purpose of these behaviors?

A yucca plant releases a scent at night when the yucca moth is active. The moth gathers pollen from the flower when she lands, and pollenates other flowers when she lands and lays her eggs on them. The plant gets cross-pollenated and the moth larvae have a steady food supply, therefore both animals are benefitting. Which relationship does this best illustrate?

Which environmental concern is most associated with burning fossil fuels?

The construction of a new coal-burning power plant would have the greatest impact on which environmental issue?

At night, moths travel toward light. Which type of behavior does this describe?

A field ecologist wants to determine the interactions of various populations of organisms living in a large grassland field. Which method is best for conducting this study?

Which environmental factor would cause the greatest decrease in the number of species of plants and animals living in some of the lakes in the United States?

If worldwide deforestation is not regulated, what could most likely result?