Field mustard is an annual plant. This means field mustard plants die off every winter, and new plants grow in the spring from the seeds that the plants produced. In a certain population of field mustard plants, there are some plants that flower sooner after they germinate and others that flower later. This is because of genetic differences between the plants. After several years, the average number of days between germination and flowering has changed, as shown in the graph below.

graph of the original and current distributions of days to flowering; the current population takes fewer days on average
Data adapted from Franks, Sim, and Weis, Proc. Natl Acad. Sci. USA, January 2007

Which of the following best explains what may have caused this change?

Hunting in the darksome fish rely on senses beyond sight. in the darkness of the marianas trench, a fish called the rattail has an extremely sensitive sense of smell. the fish uses scent, rather than sight, to steer toward food. once it's near food, the rattail uses a special organ on the bottom of its chin to guide itself by feel.marine snowone staple of the deep sea diet is "marine snow," flakes of organic, edible substances that sink down from the upper ocean. animals at the ocean's bottom find sustenance in everything from the bodies of dead creatures to fecal matter. marine snow is diverse enough to support numerous species. for instance, several species of snails and worms feed exclusively on deceased whales.microorganismsthe deep sea is an intricate ecosystem, and even the ocean floor itself plays a part. hydrothermal vents are cracks in the sea floor where erupting magma mixes with ocean water to produce plumes of hot, sulfur-rich chemicals. some microbes can use these chemicals for energy, sustaining their existence and that of the animals who depend on their roles in the deep sea food chain.

Control variable- changedependant variable- stays the samechanging- food itemsdependant- presences of proteins

What have scientists learned about plant behavior by studying the dodder plant