Answer:
Experiment
Explanation:
For such an investigation an Experiment would be the better option. This is because in an experiment you would have both an experimental group and a control group. This would allow you to use fertilizer on one but not the other, therefore, providing seperate results that you can use to compare with one another. This ultimately helps you determine the actual effects that fertilizer has on the growth of plants, since the fertilizer would be the only variable in the experiment. An observational study would only allow you to observe the plants in a natural scenario, without interfering and seperating the plants into different groups with different environments.
Smoking and unhealthy diet
Answer:
Fault
Explanation:
A break or crack in earth's lithosphere along with rocks move. Earth is made up of 4 basic layers a crust,mantle,outer core,inner core and lithosphere. A solid crust and hard layers of mantle make up a region name the lithosphere. The lithosphere is made up of pieces of tectonic plates. These plates are constantly changing and move towards the mantle. Non-stop movement of tectonic plates causes stress on the earth's outermost layer i.e,the crust. When these stresses extends it leads to cause cracks called faults.
The structure that produces and organizes the proteins that form spindle fibers is most likely the metaphase because that is what pulls the fibers apart
