The Carbon Cycle This is how carbon is 'recycled' in the environment. Carbon is used in a variety of compounds such as carbon dioxide (obviously!)and sugars as well as many others. Try clicking on the title to take a short revision quiz on the carbon cycle. GCSE Biology Nutrient cycle. View more presentations from Carla Smedberg. Posted by Biology blogger. Email This BlogThis! Share to Twitter.
The halogens are the Group 7 non-metals that are poisonous and include fluorine, chlorine, bromine, iodine and astatine.; Halogens are diatomic, meaning they form molecules of two atoms.; All halogens have seven electrons in their outer shell. They form halide ions by gaining one more electron to complete their outer shells.; Fluorine and Chlorine are both gases at room temperature.
Biology - AQA GCE Mark Scheme 2010 January series 5 2 (d) Investigation refers to a single species and other species might not respond in the same way; Investigation carried out in greenhouse where conditions controlled; Accept any other valid answers relating to how an increase in carbon dioxide concentration might increase caterpillar damage.
Carbon dioxide only comprises 0.04 % of the earth’s atmosphere but it is a vital molecule in many processes and effects organisms directly with photosynthesis in plants, body functions causing global warming which then has numerous indirect effects on organisms. Arguably one of the most important processes in plants is photosynthesis which requires carbon dioxide and water to form glucose.
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A 100% 25 mark A-Level Biology essay addressing the title: Carbon dioxide may affect organisms directly or indirectly. Describe or explain these effects. Includes: Holistic introduction Photosynthesis - Calvin Cycle Photosynthesis - limiting factors Haemoglobin and the Bohr shift Gaseous exchange - Plants and humans Regulation of heart rate The Carbon cycle Environmental impacts of CO2.
The acetyl CoA reacts with a four-carbon molecule, releasing coenzyme A and producing a six-carbon molecule that enters the Krebs cycle. In a series of oxidation-reduction reactions, the Krebs cycle generates 8 reduced coenzymes, 2 ATP by substrate-level phosphorylation, and 4 carbon dioxide are lost. In total therefore, per glucose molecule 2 ATP, 6 NADH and 2 FADH are produced. The Krebs.
Carbon dioxide is produced during respiration and since the gradient goes the opposite way, it can diffuse along the tracheal system to the air. Active insects need muscles to pump air in and out of the tracheal system; Ventilation assists in the mass transport of oxygen and carbon dioxide and maintains diffusion gradients.