Development of Drug Testing Whenever new drugs are developed, they first need to be tested for effectiveness and side-effects, before they can be sold to the general public These are known as clini...
Practical: Determinig the Tensile Strength of Plant Fibres The tensile strength of a fibre refers to the maximum load it can carry before breaking For example, this information would be important w...
Practical: Identifying Tissue Types Within Stems In order to identify tissue types within stems, a permanent pre-prepared slide could be used Alternatively, a section of a plant stem could be cut a...
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...
