Casey rides a very fast bicycle on flat terrain but has difficulty climbing hills. which solution would improve the performance of the bicycle on hills

9. the history of life on earth is recorded in

In which state was more than 100 billion tons of coal mined in 2005?

3. in the fruit fly, recessive mutation brown, b, causes brown color of the eye and absence of red pigment. recessive mutation p of another independent gene causes purple color of the eye and absence of brown pigment. the cross of a brown-eyed female and purple-eyed male produced wild type eyes. what will be the colors and their ratio in f2?