Question

experiment set-up

1. there is considerable overlap in the diets of both types of squirrels. red squirrels were introduced to the mountains in 1941. what effect would introduction have on mt. graham squirrels?
2. what is the purpose of the random lines?

Explanation:

1. Since there is diet - overlap, red squirrels' introduction could lead to competition for food resources. This may result in reduced food availability for Mt. Graham squirrels, potentially affecting their population size, health, and survival.
2. Without more context about what "random lines" refer to in the experiment, it's hard to say. In general, in ecological or biological experiments, random lines could be used for sampling (e.g., transects for counting organisms), or for creating a randomization scheme in experimental design to reduce bias.

Answer:

1. Red squirrels' introduction may cause competition for food, potentially harming Mt. Graham squirrels' population due to reduced food availability.
2. Without more context, it could be for sampling or reducing bias in experimental design.