The table below describes the diet of several organisms that are found in a meadow ecosystem. Diet Organism Songbird Mouse Grasshopper Fox Snake Toad Grasshoppers Seeds Grasshoppers Grass Toads, Mice, Snakes, Grasshoppers Grasshoppers, Mice, Toads Grasshoppers Which food web shows the correct feeding relationships among these organisms? Grass--> Grasshopper--> Toad--> Fox

Seeds--> Toad--> Mouse--> Fox

Grasshopper--> Songbird--> Mouse--> Toad

Mouse--> Songbird--> Grass--> Snake​

When a patient is incapacitated, providers are required to follow any instructions outlined ina. an advanced care directiveb.patient educational materialsc. a willd. a consent form

[120 total points] (public health) in one of the largest human experiments ever conducted, in 1954 a randomized controlled trial was run to see whether a vaccine developed by a doctor named jonas salk was effective in preventing paralytic polio. a total of 401,974 children (ages 6–9), chosen to be representative of those who might be susceptible to the disease, were randomized to two groups: 200,745 children (the control group c) were injected with a harmless saline solution (a placebo) and the other 201,229 children (the treatment group t) were injected with salk’s vaccine.what was the point of giving saline solution to the children who didn’t get the vaccine? explain briefly.

Which of the following does not cause blindness? a. cataractsb. glaucomac. osteoarthritisd. diabetes