A doffer is someone who removes bobbins, pirns or spindles holding spun fiber such as cotton or wool from a spinning frame and replaces them with empty ones. Historically, spinners, doffers, and sweepers each had separate tasks that were required in the manufacture of spun textiles. From the early days of the industrial revolution, this work, which requires speed and dexterity rather than strength, was often done by children. After World War I, the practice of employing children declined, ending
For a plant organ to bend in response to a stimulus, differential growth of cells on either side of the organ is required. For example, for the stem of a plant to bend toward a light source, cells on the shaded side of the stem near the shoot tip must elongate faster than cells on the lighted side.
About Kansas Plants. Over 2000 of the plants found in Kansas are vascular flowering plants. Vascular plants have true leaves, stems, and roots. They have a xylem layer that transports water and nutrients. Flowering plants reproduce by enclosed seeds-an egg is enclosed in the pistil and is fertilized by the pollen.bout Kansas Plants. Over 2000 of the plants found in Kansas are vascular flowering plants. Vascular plants have true leaves, stems, and roots. They have a xylem layer that transports water and nutrients. Flowering plants reproduce by enclosed seeds-an egg is enclosed in the pistil and is fertilized by the pollen.