Macular degeneration is a serious disease of the eyes that can lead to blindness. A recent study suggests that nutrients such as lutein and zeaxanthin, found in green leafy vegetables, can slow the onset and progress of this disease. In the study, a group of older individuals were asked about their eating habits. The group who ate green leafy vegetables fewer than two times a week had a significantly higher rate of macular degeneration than those who ate green leafy vegetables five or more times per week. They also had a higher rate of cases that were considered severe among those who had the disease. (a) Is this an observational study or a controlled experiment? Explain.

(b) Can the researchers conclude that eating fewer green leafy vegetables causes an increased risk in macular degeneration? Explain.

(c) Identify the population and the sample.

i will take them

step-by-step explanation:

answer:

the position of equilibrium will shift to the left.

step-by-step explanation:

the general equation for the dissociation of a weak base is

b + h₂o   ⇌   bh⁺ + oh⁻

according to le châtelier's principle, when a stress is applied to a system at equilibrium, the system will respond in a way that tends to relieve the stress.

if you apply a stress by adding more bh⁺ or oh⁻,   the system will respond by moving in a direction that gets rid of the added ions.

the position of equilibrium will shift to the left, forming more of the undissociated base.

  the correct choice is marked

step-by-step explanation:

the first two graphs show multiple turning points. the last graphs matches the description in every detail.

answer: my brother can figure it out, imma go get him so i can answer : ) edit: my brother is sleeping, sorry man

step-by-step explanation: