狠狠撸

evolution drosophila pair-rule genes segment polarity genes gap genes segmentation genes forensics autoradiography hybridization western blotting blotting dna extraction electrophoresis pcr moleecular biology dna profiling dna finger printing laughter breath green tea short term memory long term memory brain boosting laser applications to medicine laser therapy struggle for existance survival of the fittest herber spencer charles darwin natural selection insect zebra-stripe pattern drosophila development dna