Final answer:
Rudolf Jakob Camerarius helped make it possible for people to artificially pollinate, breed, and hybridize plants by discovering separate male and female reproductive organs in plants and identifying factors influencing viable pollen production.
Step-by-step explanation:
Rudolf Jakob Camerarius contributed to the development of artificial pollination, plant breeding, and hybridization by discovering that some plants have separate male and female reproductive organs. He observed that not all pollen was viable and that the ability to produce viable pollen could be inherited maternally. Camerarius also identified cytoplasmic factors that influence the production of viable pollen, which led to the development of male-sterile plants. These male-sterile plants made it easier to perform controlled crosses and produce hybrid seeds.