Which statement best summarizes the evolutionary history of the area shown? a) the area was once an ocean and was replaced by taiga and coniferous forest. b) the area was once covered by an ocean and was replaced by temperate deciduous forest. c) the area was once a temperate deciduous forest and was replaced by a freshwater lake. d) the area was once a freshwater lake, but it was replaced by the expansion of an ocean.

nucleic acid molecules are incredibly complex, containing the code that guarantees the four different nucleotide units comprise dna, the nucleic acid of interest to the genealogist. and one of four nitrogen-containing molecules called nucleotides

the potatoes have high sugar concentrations and although these potatoes were different we could seethe effects that their sugar concentrations had in different environments. for example, the potatoes in sample a, were placed in pure water. this created a hypertonic environment and caused the potatoes to draw in water from its surroundings. we saw the opposite happen with the potatoes in sample b when placed in the sodium chloride solution. the potatoes in this case were in a hypotonic solution and therefore lost water to their surroundings.