How do you following accurately pairs a type of receptor to the stimuli in which a responds?

What was photo 51 with rosalind franklin?

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?

Apaleontologist finds a plant fossil that shows that the plant had seeds. what can the paleontologist conclude?