WJEC GCE AS level Biology Unit 2 (from 2008 onwards)
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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.
2.2 Gas Exchange
Gas exchange is a process in biology where gases contained in an organism and atmosphere transfer or exchange.
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!
2.4 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.
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.