What is contugation?

How did the finches help Darwin to formulate his theory of natural selection and evolution? What is keeping biomass energy from being used world wide? Why does metal expands more than any other metal? What are the advantage and disadvatges of a light microscope? Why did it take eighty years to discover astatine? How do you start a prefect speech off really funny? How many centimeters are in 1.08 meters? What element are stars mostly composed of? How do you do a science fair project for grade 5? How do you use the word instant in a sentence? How many 25 meters in a mile? What is the difference between AU and UN? ATP can be broken down into? What does host mean in a science term? What is 82.0 kg in pounds? What is the best example of a noncyclic event is? Why do agricultural inspectors check samples of grain with a microscope before permitting the grains? Is the bending of glass over a flame chemical or physical? Example or perturb in a sentence? Difference between assumptions and limitations in research?