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WJEC GCE AS level Biology Unit 2 (from 2008 onwards)

This presentation is hosted by myself, but it is entirely edited by some of my students using resources they have found, discovered or made themselves. If you want to help edit this feature, contact me and I can send you a link to do so!

WJEC Biology BY2 on Prezi


2.1 Classification

Modern biological classification has its root in the work of Carolus Linnaeus, who grouped species according to shared physical characteristics. These groupings have since been revised to improve consistency with the Darwinian principle of common descent.
wjec_2-1.pdf
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2.2 Gas Exchange

Gas exchange is a process in biology where gases contained in an organism and atmosphere transfer or exchange.
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2.2_adaptations_for_gas_exchange.pptx
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2.2a_thechloride_shift_exercise.doc
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2.2_adaptations_for_gas_exchange_rev_notes.docx
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2.3 Transport Systems

Transport Systems is third studio album of American singer, Ari Gold. But we mean it in the sense of getting things around inside an organism!
2.3_a_transport_1.pptx
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2.3_b_circulation_and_heart.pptx
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2.3_c_transport_in_plants.pptx
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A summary of Plant Transport Systems (from Glendale High)

This animation of transpiration is great (from KScience)
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from wikimedia commons

2.4 Reproductive Strategies

Reproduction is the biological process by which new "offspring" are produced from their "parents". Reproduction is a fundamental feature of all known life. The known methods of reproduction are broadly grouped into two main types: sexual and asexual.
2.4_a_reproductive_strategies.pptx
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2.4_b_asexual_reproduction.ppt
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2.5 Nutrition

2.5_nutrition.pptx
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2.5_digestive_sysytem_visual.pdf
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2.6 Parasitism

Parasitism is a non-mutual relationship between organisms of different species where one organism, the parasite, benefits at the expense of the other, the host.
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Male human head louse, Pediculus humanus capitis (from wikimedia commons)
2.6_parasites.pptx
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