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There are two types of Litmus Paper: Red and Blue. Red Litmus Paper turns blue when it is dipped in a solution of pH 8.3 or more (stronger alkalis), and Blue Litmus Paper turns red when dipped in a solution of pH 4.5 or less (stronger acids)
Phenol Red
Phenol Red turns yellow when it is dipped [...]
Filed under: Chemistry, Science | Tagged: indicators, Litmus, pH, pH indicators, Phenol Red, Universal Indicator | 2 Comments »
Fossil Record
Shows Change
Simple –> Complex
Aquatic –> Terrestrial
Major “groups” evolving to others (fossils showing mid-change creatures)
Fish –> Amphibians
Reptiles –> Birds
Comparative Anatomy (Homologous Structures)
Vertebrate forelimbs (pentadactyl limb – penta: five, dactyl: finger)
Similar pattern implies this structure has been inherited through a common ancestry in amphibians, reptiles, birds and mammals
Biochemistry
The longer the time since there was a common [...]
Filed under: Biology, Science | Tagged: anatomy, biochemistry, biogeography, change, evidence, evolution, fossil record, fossils, ratites | Leave a Comment »
When universal indicator is placed into water, it displays a pH of roughly 7. When one blows through a straw into the water, the pH drops to 6. This is because of the Carbon Dioxide the action of blowing into the water adds to the solution.
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Just heard: George Michael – I Want Your Sex (Parts [...]
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