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QLDBiologyQuick questions
Unit 3: Biodiversity and the interconnectedness of life
Quick questions on Linnaean classification and dichotomous keys: QCE Biology Unit 3
5short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.
What is the Linnaean hierarchy?Show answer
The hierarchy has eight ranks from broadest to most specific. A simple mnemonic is "Do Kings Play Chess On Fine Green Sand".
What are the three domains?Show answer
Bacteria, Archaea and Eukarya. Bacteria and Archaea are both prokaryotic but differ in cell wall chemistry, membrane lipids and ribosomal RNA. Eukarya contains protists, fungi, plants and animals.
What is q1?Show answer
List the eight Linnaean ranks in order from most inclusive to least inclusive, using the platypus (_Ornithorhynchus anatinus_) as an example. [3 marks]
What is q2?Show answer
A student wrote a key with the couplet "1a. Has fur, go to 2" / "1b. No fur, go to 5".
What is q3?Show answer
Refer to a survey of three insects: dragonfly, ant, beetle. (a) Construct a dichotomous key with two couplets distinguishing the three. (b) Identify the order to which each belongs.
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