PLEASE HELP WILL MARK BRAINELLEST Cross a red-flowered snapdragon with a white flowered one. Then perform another cross with the offspring of the first cross. List genotypic and phenotypic ratios for each cross

Which of the following types of pollution is most responsible for large numbers of deaths worldwide because of unsafe drinking water? (a) nutrient pollution (b) thermal pollution (c) pathogen pollution (d) sediment pollution

24. how are vaccines used to keep people healthy?

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