The snowshoe rabbit has white fur in winter and dark fur in summer. what is the main survival advantage of this fur color change to the rabbit?
a) the light fur keeps the rabbit from getting sunburned in summer.
b) the fur color is an adaptive form of camouflage to avoid predators.
c) the dark fur absorbs more sunlight so the rabbit is warmer in winter.
d) the white fur is more valuable to fur trappers, so the animal will be trapped and better fed in winter.

Which of the following initial observations would more directly lead to this research study? a) ginko biloba is cost effective and also possesses heart-protective, antioxidant, anti-inflammatory properties. b) metformin is an effective treatment of patients with t2d, but shows side effects that complicate the disease state. c) over the past several years, the cost of treating t2d within the united states has increased dramatically. d) many plants contain molecules that improve the health and quality of life of patients with a variety of diseases like t2d. e) t2d affects millions of individuals in the usa and worldwide many of who could benefit from improved therapies.