Conditions Required for Bacterial Growth Bacteria are microscopic?prokaryotes?(meaning their cells do not contain a nucleus or membrane-bound organelles) They are often used in studies to test anti...
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...
