Plant Fibres Sclerenchyma fibres and xylem vessels are made of long, hollow plant cells These cells are hollow due to the fact that their cell contents died (often due to the lignification of the c...
Starch & Cellulose: Structure & Function Starch Starch is the storage polysaccharide of plants It is stored as granules in plastids (e.g. chloroplasts) and amyloplasts (small, membrane boun...
Importance of Water & Inorganic Ions to Plants Plant cells perform a variety of different functions In order to perform these functions efficiently, the plant requires water and inorganic ions ...
Plant Stems Xylem vessels The functions of xylem tissue in a plant are: Vascular tissue that transports dissolved minerals and water around the plant Structural support Their cell walls contain lig...
Plant Cell Structure Plant cells contain most of the organelles found in animal cells, along with a few extra organelles that are only found in plant cells Cell wall Cell walls are formed outside o...
Conservation of Biodiversity When species go extinct it leads to an overall decrease in biodiversity In recent times many species have already gone extinct, while others are endangered An endangere...
Classification Taxonomy is the practice of biological classification The phylogenetic classification system enables us to arrange species into groups based on their evolutionary origins and evoluti...
Reproductive Isolation Organisms that belong to the same species share the same characteristics and are able to produce fertile offspring Reproductive isolation occurs when changes in the alleles a...
Hardy-Weinberg Equation Hardy-Weinberg Principle The Hardy-Weinberg principle states that if certain conditions are met, the allele frequencies of a gene within a population will not change from on...
