Explain the negative impact of human activity on the environment. Be sure to consider: pollution by agricultural practices such as use of chemical fertilizers;
products of industrialization and improper garbage disposal;
impact on eco-tourism;
loss of habitat, species;
impact on human health.

When the oxygen produced by photosynthetic plants in the water dissolves in the water, which of these is being formed?

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

What is expressed when both alleles for a gene are equally expressed as in human blood type?