A student took 15 identical sized chips. The mass of each chip was recorded and the chips were placed in 4 salt solution (0.1m,0.2m,0.3m,0.4m) and pure water for 30 minutes. The chips were dried and the mass recorded. The mass change and % change in mass was calculated. Design a table to record the students raw and processed data.

In general, characteristics that an organism survive and reproduce become more common over time. what mechanism of evolution causes this?

You are studying several alleles of an e. coli helicase gene. one allele, called rsr, confers resistance to rs2014, an antibiotic that works by inhibiting helicase activity. bacteria with the rss allele are sensitive to rs2014. another allele, called ts-, produces a temperature sensitive mutation of the helicase. in bacteria with the ts- allele, helicase is inactivated at 42 °c but functions normally at 37 °c. helicase functions normally at both temperatures in bacteria with the ts allele. you obtain the following data while testing four strains of e. coli at different temperatures and doses of rs2014. each number represents the percentage of maximal dna synthesis. based on this data, assign the appropriate genotype to strains a–d in the spaces provided

Which observation supports the inference that humans and chimpanzees share a common ancestor