Adaptation (OCR A-Level Biology A): Flashcards
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Definition of adaptation
Definition of adaptation
Modification enhancing survival & reproduction in a habitat
Discontinuous variation cause
Discontinuous variation cause
Controlled by genes, minimal environmental influence
Continuous variation cause
Continuous variation cause
Combined genetic & environmental factors
Leptin gene function
Leptin gene function
Regulates appetite by signalling brain to reduce food intake
Allozymes
Allozymes
Enzyme variants encoded by different alleles of same gene
Isozymes
Isozymes
Enzymes catalysing same reaction, encoded by different genes
Three types of adaptations
Three types of adaptations
Structural, behavioural, physiological
Fennec fox kidney adaptation
Fennec fox kidney adaptation
Exceptional water reabsorption; can survive without drinking
Sulfolobus acidocaldarius survival temp
Sulfolobus acidocaldarius survival temp
Around 80°C in volcanic springs
Convergent evolution
Convergent evolution
Unrelated organisms develop similar adaptations in like niches