Chemical reactions cannot be observed directly because molecules are too small to be seen using your eyes or a microscope. Scientists use evidence to infer that a chemical reaction has occurred. Which evidence does not indicate that a chemical reaction has occurred?​

Which sentences describe the logistic growth model? there are three different phases of the s-shaped curve. at first, growth is exponential because individuals are few and resources are plenty. this growth model occurs in a situation where resources are plenty and individuals are few to consume the resources. population growth decreases as resources become limited. when a population size reaches the carrying capacity of its environment, the population growth slows down or stops completely. the model looks like a j-curve.