Vascular tissue is comprised of the xylem and the phloem, the main transport systems of plants. xylem, plant vascular tissue that conveys water and dissolved minerals from the roots to the rest of the plant and also provides physical support. There is an explanation video available below.
NB: Birds do not have teeth, although they may have ridges on their bills that help them grip food. Birds swallow their food whole, and their gizzard (a muscular part of their stomach) grinds up the food so they can digest it. There is an explanation video available below.
- The most familiar invertebrates include the Protozoa, Porifera, Coelenterata, Platyhelminthes, Nematoda, Annelida, Echinodermata, Mollusca and Arthropoda. - Invertebrates are animals that neither possess nor develop a vertebral column, derived from the notochord.
Exosmosis is the movement of water outside the cells when a cell is placed in a hypertonic solution. The cell becomes flaccid by the movement of water outside. There is an explanation video available below.
Air Pollutants The primary pollutants of concern in land and soil are heavy metals, such as lead, mercury and others, pesticides and other persistent organic pollutants, and pharmaceuticals, such as antibiotics used for livestock management. Nitrogen (N), nonmetallic element of Group 15 [Va] of the periodic table. It is a colourless, odourless, tasteless gas that is the most plentiful element in Earth's atmosphere and is a constituent of all living matter. There is an explanation video available below.