You find some rather strange plants in your backyard. They consist only of thin, pale yellow stems that are wrapped around other species of plants growing nearby. You experiment by unwrapping some of the strange yellow plants and planting half of them alone in pots of soil and half in pots with other plants from your yard. You water and fertilize both sets of pots, but after a few weeks you find that the yellow plants that were potted alone have died, while those potted with other plants are thriving. What term would you use to describe the strange yellow plants?

The realized niche of Semibalanus is

Consider a compartmental model for an influenza (flu) virus, with susceptible, infected, and immune categories. Match each of the following with one of the three categories: A person carrying the flu virus and showing symptoms ,  A person who has never been vaccinated for the flu virus A person who was vaccinated against the flu 5 years ago (vaccine effective for 1 year)  

Which of the following is probably the most important factor in the distribution of organisms in the environment?

How do corals react when water temperatures are too high?

Why are red algae found in deeper oceanic waters?

A fisheries biologist tells you she is studying a cohort of salmon returning to their birth river. What can you infer about those salmon?

    Organisms that have a Type III survivorship curve have a relatively

Given the formula: The rate of population growth approaches zero as .  Graphed, a population growing as described by this equation would create a line that is roughly .  

Examine the coastal landscape in the photograph on the right. Based on all the features present, what is the best description for the entire coastline from the white arrow to the bottom of the image?