Scientist's once believed that living organisms could be created from non-living matter. It was known as Spontaneous Generation. In 1668, an Italian scientist, Francesco Redi, postulated that the theory of Spontaneous Generation is incorrect. He designed a scientific experiment to test the spontaneous creation of maggots. He put fresh meat in each of the two different jars. One jar was left open and the other jar was covered with a cloth. Several days later the open jar contained maggots; the covered jar contained no maggots in the jar - they were found on the cloth covering the jar. He thus successfully demonstrated that maggots came from fly eggs. He also thought he helped disprove the theory of Spontaneous Generation. Unfortunately, he did not.
Answer:
Vitamins A and D are added to margarine during production so it will have a similar vitamin level to butter. Nutrients may also be added to foods to fortify or enrich them even if the vitamins and minerals added are not normally contained in that food.Margarine makes an important nutritional contribution to the diet by being a source of one or more essential fat-soluble vitamins such as vitamins A and/or D and by being low in saturated fat.
Answer/Explanation:
Natural selection - over time - selects for traits that improve fitness. A butterfly with wing coloration that looks like a hungry owl would certainly be a deterrent to their natural predators, such as smaller birds. This is because the owl is the predator of the smaller birds, and their instinct is to avoid the owl.
If a mutation arose that resulting in coloration that looked like an owl, (or at least slightly menacing) this would be beneficial to the butterfly, as it would be more camouflaged from predators. This means it would be more likely to reach reproductive age and pass the mutation onto its offspring, who would also have a competitive advantage.
Over time, this would lead to a population of butterflies with coloration that looks more and more owl-like .
Answer:
To <em>Experiment</em>.
Explanation:
The scientific method is:
Observation/Question
Research
Hypothesis
Experiment
Collect Data
Analysis
Conclusion
