1. Identify the type of ecosystem service being provided in each of the following examples. (1.5 points: 0.5 point for every 2 correct examples) Natural resource

Type

Cornfield in Kansas

Bacteria that decompose waste along Gulf Coast

Ocean currents that keep Pacific Northwest air cool and moist

Flower garden at a national landmark

Lumber from an oak tree

Animals that eat seeds then spread the seeds through their waste

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