How do solid carbon compounds change to carbon dioxide in the atmosphere during the carbon cycle? a. cellular respiration by living things
b. photosynthesis by photoautotrophs
c. decomposition of dead organisms
d. two of the above

As the earth formed, the force of gravity increased due to increased mass. what effect did this increased gravity have on the forming planet?

Identify the fungus type pictured below. the image shows a mushroom used often in cooking, will gills underneath its cap.

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