biodiversity- plants Flashcards
kingdom plantae
plants common features
- Photosynthetic
- Cell walls made of cellulose
- Multicellular
- Specialized tissues and organs
- Alternation of generations
alternation of generations
alternation of generations
Life cycles of protists and plants with alternating gametophyte and sporophyte stages.
gymnosperms
gymnosperm, any vascular plant that reproduces by means of an exposed seed, or ovule—unlike angiosperms, or flowering plants, whose seeds are enclosed by mature ovaries, or fruits. The seeds of many gymnosperms (literally, “naked seeds”) are borne in cones and are not visible until maturity
angiosperms
angiosperms are plants that produce flowers and bear their seeds in fruits
xylem
Tissue that conducts water and minerals upwards in a plant, comprised of tracheids, vessels (in angiosperms), fibres and parenchyma
phloem
phloem
Tissue that conducts food both upwards and downwards in a plant. Comprising sieve cells (that transport sucrose), their adjacent companion cells and fibres
vascular bundle
Strand of xylem and phloem separated by procamium in dicots, and often with a capping of fibres on the outer side.
guard cells
Pair of cells controlling the size of the aperture of a stomatal pore.
stomate
Pore in the surface of a leaf, bounded by two guard cells.
mesophyte
Mesophytes are terrestrial plants which are adapted to neither particularly dry nor particularly wet environments
xerophyte
Plant showing adaptations to a dry environment, including thick cuticle, small tough leaves, sunken stomata, leaf hairs or waxes, leaf shedding or succulence.
transpiration
Transpiration is the process of water movement through a plant and its evaporation from aerial parts, such as leaves, stems and flowers. It is a passive process that requires no energy expense by the plant.
