Tyrrell wanted to measure the growth of tomato plants in response to different types of fertilizer. which tool would be most accurate?

A tomato could grow to as tall as a foot or taller. The best tool that would measure the height of the tomato plant in response to different types of fertilizers used should be able to measure a foot long or shorter. Thus, the answer should be ruler. 

The return of the wolf to yellowstone national park will probably affect the bird population to some degree, not significantly. while wolves will hunt birds when necessary, they prefer to hunt larger prey. the bird population will most likely only be affected when hunting is scarce for the wolves. birds of prey will also probably not be affected as much as other birds who spend more time on the ground hunting for food as the tend to spend more time in the air or in trees since they do not need to stay on the ground for long due to the nature of the way they hunt.