Hummingbirds use their long beaks to drink nectar from flowers. In turn, they carry the pollen from flower to flower, assisting the reproduction of the flowers.

What relationship does this describe?

When measuring biodiversity, there are several possible indices to use, such as alpha diversity or beta diversity. What does beta diversity, or species evenness, measure?

Which of the following best defines the interspecies interaction in the following situation?

Jackrabbit populations introduced to the Australian outback from Europe in the 1800s decimate communities of desert shrubs and grasses.