(a) populations and the way in which they grow - a simple quantitative treatment including immigration, emigration, birth and death rates (b) graphs showing population growth and factors affecting population growth; competition; carrying capacity © the regulation of populations by density dependent and density independent factors (d) the sampling techniques used to assess abundance and distribution of organisms in a habitat (e) the concept of ecosystems, including that ecosystems range in size from very large to very small (f) the sun is the source of energy for an ecosystem (g) the concepts of habitat and community (h) the transfer of biomass from plants to animals including trophic levels, efficiency of transfer; gross and net production and pyramids of biomass (i) the principles of succession as illustrated by the colonisation of bare rock to form woodland (j) the terms primary and secondary succession, pioneers, sere and climax community (k) the importance of organic breakdown in recycling nutrients (l) the carbon cycle (m) the effects of human activities on the carbon cycle including climate change affects the distribution of species and is a possible cause of extinction (n) the role of bacteria in the nitrogen cycle and the significance of nitrates in producing proteins and nucleic acids (o) the importance of human activities such as ploughing and drainage in producing the aerobic conditions needed for nitrification and the economic importance of the nitrogen cycle in relation to food production and fertiliser application § the process of eutrophication and algal blooms and that drainage has adverse effects on habitats

Complete booklet to go alongside WJEC A level spec for Unit 3.6 including a many links to useful and current videos. (a) the reasons for species becoming endangered and causes of extinction (b) how gene pools are conserved in the wild and in captivity © the issues in agricultural exploitation - conflicts between production and conservation and possible means to resolve such conflicts as illustrated by deforestation and overfishing (d) the increased human pressures on the environment including the need to achieve sustainability by changes in human attitudes and making informed choices (e) the need for political decision making to be informed by knowledge based on sound scientific principles (f) the concept of planetary boundaries

Four complete powerpoints to use for the WJEC Photosynthesis topic Unit 3.2 (a) the distribution of chloroplasts in relation to light trapping (b) chloroplasts acting as transducers converting the energy of light photons into the chemical energy of ATP © the process of light harvesting and the absorption of various wavelengths of light by chlorophyll and associated pigments and the energy transfer to reaction centres (d) the basic features of Photosystems I and II (e) cyclic and non-cyclic photophosphorylation as sources of electrons for the electron transport chain (f) photolysis as a source of electrons for Photosystem II (g) the reduction of NADP by the addition of electrons and hydrogen ions in the stroma maintaining the proton gradient (h) reduced NADP as a source of reducing power and ATP as a source of energy for the following reactions: the light-independent stage and the formation of glucose; uptake of carbon dioxide by ribulose bisphosphate to form glycerate-3- phosphate catalysed by Rubisco (i) the reduction of glycerate-3-phosphate to produce triose phosphate (carbohydrate) with the regeneration of ribulose bisphosphate

Set of resources for the WJEC sexual reproduction in humans topic. Contains workbook, powerpoint and A3 learning sheets. Can be used in the classroom or as complete resources for blended learning. Powerpoint also includes links to great videos.

A key stage 3 introduction to the Habitat and adaptation topic.

Powerpoint and accompanying workbook for the WJEC A2 Biology topic sexual reproduction in plants.

Workbook and accompanying powerpoint to fit alongside the WJEC Unit 1 AS specification.

Booklet and powerpoint to cover some of the Unit 1 topic: Nucleic acids. Please feel free to change and drop me any feedback.

Powerpoint for WJEC BY1 topic cell structure and organisation. This powerpoint compares Prok and Euk cells.

Powerpoint and accompanying booklet for the WJEC topic 2.6, which looks at the adaptations for parasitism. Please feel free to adapt and change. Includes past paper questions and mark scheme. Hope they help.