How can plants that are imported from other parts of the world become pests here?

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?

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

Consider the venn diagram of plant reproduction. where in this image, areas a - d, would you insert the picture of the orange lily?