AQA A LEVEL BIOLOGY PAPER 1 EXAM WITH QUESTIONS AND DETAILED CORRECT ANSWER (VERIFIED ANSWERS| NEWEST 2024 ALREADY GRADADED A+
Why is courtship behaviour necessary?
- ANSWER-- enables individuals to recognise members of the same species
- identify a mate that is capable of breeding
What is phylogenetic classification?
- ANSWER-- based on evolutionary groups
- classifies species into groups using shared features
- arranges groups into a hierarchy
What are the three domains?
- ANSWER-Bacteria, Archaea, Eukarya
What are the taxonomic categories?
- ANSWER-Domain, Kingdom, Phylum, Class, Order, Family, Genus, Species
Why is it better to compare DNA base sequences rather than amino acids rather than investigating diversity?
- ANSWER-The same aa can be coded for by more than one triplet so even if the aa of two organisms are the same, their DNA base sequence can be different
What is a calibration curve?
- ANSWER-Calibration curves are graphs used to determine an unknown concentration of a sample by comparing the unknown to a set of standard samples with known concentrations
What are centrioles?
- ANSWER-Hollow cylinders containing a ring of microtubules arranged at right angles to each other. Involved in producing spindle fibres for cell division
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