1. According to current theories about the origin of life, which oneof the following must have preceded all the others?      eukaryotic organisms.oxygen in theatmosphere.photosynthesis.plants. 2. If the first organisms on Earth were heterotrophs they wouldhave eatenautotrophs.required organicmolecules in their environment.carried onphotosynthesis.used RNA as their geneticmaterial. 3. Algae are in the […]

For this assignment, visit your local grocery store to observe and record behaviors in the various aisles. Your visit should be long enough to observe several behaviors and situations. Read the assignment thoroughly before your observational visit in order to watch for specific behaviors. Write a four to five (4-5) […]

Multipal choice problems- 1. Which of the following includes all the others? A) atomB) cellC) organismD) population 2. In science, a hypothesis must be A) testableB) derived from a theoryC) a known factD) able to be proven absolutely true 3. A chlorine atom has 17 protons, 18 neutrons, and 17 […]

The relationship of free energy change (?G) to the concentrations of reactants and products is important because it predicts the direction of spontaneous chemical reactions. Familiarity with this relationship is essential for understanding energy conversions in cells. Consider for example the hydrolysis of ATP to ADP and inorganic phosphate (Pi): […]