As americans moved west, they built the railroad and then many new towns and cities. also, as americans moved west, the buffalo population declined. why?

Round peas are dominant to wrinkled. what would you cross a round pea with to determine if it were heterozygous or homozygous dominant? why? ?

Which element forms the basis of all organic organisms a carbon b oxygen c hydrogen d nitrogen

Which statement correctly identifies the scientific question and describes why the question is scientific? question 1 refers to the supernatural. question 2 reflects a moral or social value. question 3 refers to something that can be measured. question 4 reflects a question that can’t be observed.