<p>IHS Biology</p><p>KEY Reading chart for “What’s Your Response?” (Insights in Biology, Matter of Life, LE 2, pp. 12-15) The HOW WHY environmental Organism the organism responds to the the organism's response change/stimulu environmental change helps it survive s Falling nutrient Increased movement More likely they will encounter Escherichia coli levels in their the nutrients they need (a bacterium) environment Falling nutrient Individual slime mold cells Greater chance that at least some levels in its gather together into a mass cells will land in a place with Dictyostelium environment that changes shape and creates sufficient nutrients discoideum a little ball of spore cells that (a slime mold) bursts, scattering the spores in all directions Rainfall level Light rain – grass' roots grow Maximizes ability of the grass close to the surface plants to find and tap into water Lawn grass Heavy rain – grass' roots grow deep into the soil Odor of food We follow the odor of food More likely we'll encounter the Humans food and eat it! Warmth (as Leaves fold up Mimosa makes itself look Sensitive plant from exhaled withered and unappetizing when a (Mimosa) air) or touch plant-eating animal is close by Water Warm water – bass swim into Bass trying to keep their bodies at Striped bass temperature deeper (colder) water the best temperature for their own (a fish) Cold water – bass swim to metabolism. (Fish are "cold shallower (warmer) water blooded.") Light/dark Euglena swim towards light Since they are green, perhaps Euglena (as seen in Euglena uses light for the youtube video) photosynthesis like a plant. Light/dark Given a choice, zebrafish prefer Perhaps they hide from predators Zebrafish (use our to huddle in the dark this way in their natural class data) environment.</p>