Why is non-point source pollution difficult to control

Red flowered snapdragons are crossed with white flowered snapdragons, producing all pink snapdragons in the f1 generation. what would you expect if you crossed pink with pink? 3/4, 1/4, 1/2 red, 3/4,/1/2,/1/4 pink,1/2, 3/4, 1/4 white

What is the compliment dna strand to the following sequence: ttgactaggcta

What is the average speed of a car that traveled 300.0 miles in 5.5 hours