In a hypothetical situation, a bacterium lives on the surface of a leaf where it obtains nutrients from the leaf's nonliving waxy covering, which the leaf continually produces. The plant is not hurt or harmed by this feeding. Once the number of bacteria reaches a critical mass, they inhibit the growth of other microbes that damage the plant. Occasionally, these bacteria can gain access to the interior of the leaf, for example, if there is weather-related leaf breakage the exposes the plant's interior tissues. If this occurs, the bacteria feed on the plant's living tissue, causing minor damage. What sequences best describes the ecological roles played by the bacterium in this situation?

Dr. kaylan is an ecologist who studies bird behavior. she sets up an experiment to test which type of food crows are most likely to eat when given a choice between walnuts, corn, and sunflower seeds. to perform her experiment, dr. kaylan places three food bins in an area frequented by cows. each bin contains one of the three food types. then, she measures how much of each food type is eaten every day for a month and summarizes the results of her experiment in the pie chart below. based on her results, dr. kaylan concludes that crows choose to eat corn more frequently than other food sources because it has a higher nutritional value. what is a reasonable alternate conclusion that can be drawn from dr. kaylan's data

An example of internal feedback working to maintain homeostasis is your a. decreased respiration rate when you are studying b. decreased heart rate when you are sad c. increased respiration rate when your muscles need more oxygen d. increased heart rate when your lungs need more oxygen

15 ! come and answer! a(n) disease is caused by a pathogen and can spread among organisms. a infectious b noninfectious c toxic d contaminated