many plants have specialized structures that allow them to spread their seeds over a wide area examples of three different structures are shown in the images below. match each method of seed dispersal to the plant structure that makes it possible.​

Astudent pours 10.0 g of salt into a container of water and observes the amount of time it takes for the salt to dissolve. she then repeats the process using the same amounts of salt and water but this time she slowly stirs the mixture while it is dissolving. the student performs the experiment one more time but this time she stirs the mixture rapidly. the dependent variable in this experiment is: time for salt to dissolve speed of stirring amount of water mass of salt