If 85 g of NH4Cl reacts with 130 g of Ca(OH)2 according to the following reaction, what is the maximum mass of ammonia that can be formed? 2 NH4Cl + Ca(OH)2 CaCl2 + 2 NH3 + 2 H2O

Select the correct answer from each drop-down menu. the lac operon in e.coli regulates genes that code for enzymes required for breakdown of lactose. the lac operon is operon that is activated in the presence of .

There are only about 250,000 known fossil species. true or false

Which of these is not an example of molecular homology? 1. use of dna and rna as genetic material 2.use of glycolysis as the first step in cellular respiration in both plants and animals 3. the lack of an igf-1 gene in prokaryotes 4. the use of aldolase b to break down fructose in bacteria, plants and animals