Biology Chapter 2

The questions that drive scientific inquiry are based on observations.

For several years, a mother has recorded the data of her daughter's growth by marking her height on a door-frame.

However, keep in mind that scientists are skeptical of inferences that "stretch" far beyond the data.

This generalization that "all living things are made of cells" became part of what is known as the cell theory, one of the most important products of discovery science in the nineteenth century.

A reasonable hypothesis based on past experience is that the batteries in the flashlight are dead.

In the artificial snakes, the variable is the presence versus the absence of the colored rings.

In science, evidence consists of a collected body of data from observations and experiments.

And such evidence doesn't begin to convince scientists until the observations and experiments have been repeated multiple times with similar results.

The theory of natural selection explains the evolution of the many cases of mimicry, as well as a variety of other adaptations of organisms to their environments.

Analogies are another type of model in science.

The direction technology takes depends less on the curiosity that drives basic science than it does on the current needs and wants of humans and on the social environment of the times.