Anatomy of Flowering Plants Test - 3

Tracheids are elongated cells in the xylem of vascular plants that serve in the transport of water and mineral salts. Tracheids are one of two types of tracheary elements, vessel elements being the other.

Sclerenchyma consists of long, narrow cells with thick and lignified cell walls having a few or numerous pits.

companion cell: any of a number of specialized parenchymal cells adjacent to a sieve tube in the phloem of flowering plants, believed to regulate the flow of nutrients through the tube.

Tracheids and vessels are main water and mineral conducting tissues of xylem. Tracheid have pointed tips but vessels have blunt ends.

Trichomes are epidermal appendages, unicellular or multicellular outgrowth strictly epidermal in origin present on the stem of plants.

In angiosperms vascular tissue develop from plerome. Plerome form the central core of the primary meristem of a plant or plant part.

Stomata is present more on the lower surface of leaf. The lower surface of leaf is called abaxial part of leaf that is away from direct sunlight to prevent excess of water loss.

Jute fibers are made of high amount of lignin that deteriorate in presence of high moisture and water,

In monocotyledons, the guard cell of stomata are dumb-bell shaped, thicker on top and bottom and thinner in the middle.