Mitochondria & Chloroplast DNA Mitochondria A single mitochondrion is shown – the inner membrane has protein complexes vital for the later stages of aerobic respiration embedded within i...
Chromosome Structure Chromosomes are made of?one?very long, condensed DNA molecule?associated with proteins (in eukaryotic cells) The main proteins present are the large positively charged g...
Edexcel IGCSE Maths 復(fù)習(xí)筆記 4.2.1 Angles in Polygons What is a polygon? A?polygon?is a flat (plane) shape with n straight sidesFor example: A triangle is a polygon with 3 sidesA quadrilateral poly...
Tracer & Ringing Experiments Tracer and ringing experiments have been used to investigate mass transport in plants It is described as a ringing experiment because it involves the?removal...
Evaluating Data Linked to Mass Flow Hypothesis The mechanism of transport that occurs within the phloem is still debated by scientists The mass flow hypothesis suggests that there is a trans...
Edexcel IGCSE Maths 復(fù)習(xí)筆記 4.1.1 Angles in Parallel Lines What are parallel lines? Parallel lines are lines that are always equidistant (ie the same distance apart) – no matter how far the lines ...
Phloem: Mass Flow The?Mass Flow Hypothesis?was the model initially used to explain the movement of assimilates in the phloem tissue The mass flow hypothesis was modelled by Ernst Münch in 19...
The Sucrose Loading Mechanism Assimilates such as sucrose are transported from source to sink through the phloem sieve tubes Carbohydrates are generally transported in plants in the form of ...
Movement in the Phloem Although translocation could refer to the transport of substances in the xylem and phloem, as it means ‘moving from one place to another,’ it is more commonly connecte...
