FILE- This May 1, 2018, file photo shows Merck corporate headquarters in Kenilworth, N.J. Pharmaceutical giant Merck will close its plant in Northumberland County, Pennsylvania. According to a ...

Plant breeding is the production of plants by selective mating or hybridization. It is the traditional mechanism for producing new varieties of plants for horticulture and agriculture ...

Posey: Umm. you don't always need roots. Stems do the job, too. When you put the plants in the water, with or without roots, the tubes in the stem transport the water to the flower. Ivy ...