I need help no links and I will give brainlist

How do chloroplasts set plants apart from other living things

Many farmers prefer cattle without horns because it is safer for their herds. the allele for no horns (n) is dominant to the allele for the presence of horns (n). a farmer mates a male with horns to a heterozygous female without horns. what is the chance that the offspring will have horns?

20 the compound al(nh3)2 has atoms of nitrogen.