.- La urea (NH2)2CO se utiliza como fertilizante. Calcula el número de átomos de N, C, O e H en 1.68x104 g. de urea.

its d lol

; 0

if the type of the food available changes, then the frequency of beak types will change, because birds with beaks more suited to the available food will be more successful over time.

producers: apple trees, potatoes, carrots, grains, acorns, cabbage, grass, corn, lettuce

consumers: deer, mice, rabbits, chickens, squirrels, horses, worms, cows

predators: eagles, frogs, wolves, owls

idk im sorry.