These nematodes, sold under the names of Scanmask and Nemasys, are microscopic, wormlike creatures that will destroy the fungus gnats but are not harmful to people, pets, plants, or earthworms. These products can be used whenever the soil is not frozen and will keep working for many months.
Vegetative structures. There are three levels of integrated organization in the vegetative plant body: organ, tissue system, and tissue. The organs of the plantâthe roots, stems, and leavesâare composed of tissue systems (dermal tissue, ground tissue, and vascular tissue; see below Tissue systems).
Pulling and pushing ...To Leaf Organ systems in plants Connecting the Systems (Tissues) In humans, our tissues are mainly for things that plants don't even do, like moving and thinking, but just as we have connective tissue for our blood transport plants have tissues for their main functions; Transporting energy and water.