Which sentence best explains how enzymes spped up a chemical reaction a)enzymes remove heat from a chemical reaction b)enzymes lower the activation energy of a chemical c)enzymes add heat to a chemical reaction d) enzymes are niot changed as a result of a chemical reaction

economic impact of malaria is estimated to cost africa $12 billion every year. this figure factors in costs of health care, absenteeism, days lost in education, decreased productivity due to brain damage from cerebral malaria, and loss of investment and tourism.

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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.

1. is geographic distribution

2 is increasing complexity

3 is transitional forms