1. Introduction to Biology

Which of the following shows the best order of steps of the scientific method?

A scientist observes that even after sterilizing a broth, cells reappear in the broth over time. The scientist then asks: 'Why do cells reappear in the broth after sterilization?' and designs/conducts an experiment. Considering this, appropriately label each of the following blanks as either a 'prediction, hypothesis or theory.'

________________: Cells will only appear in the broth exposed to a source of preexisting cells.

________________: Cells appear only when preexisting cells grow & divide; therefore, cells only appear in exposed broths.

________________: All organisms consist of cells & all cells come from preexisting cells.

Which of the following statements about the cell theory is false?

Which of the following is an example of inductive reasoning?

a. All cows eat grass.

b. My cow eats grass and my neighbor's cow eats grass; therefore, all cows probably eat grass.

c. If all cows eat grass, when I examine a random sample of all the cows in Minnesota, I will find that all of them eat grass.

d. Cows may or may not eat grass, depending on the type of farm where they live.

A scientific hypothesis is ________.

a. An opinion

b. A proposed explanation for an observation

c. A fact

d. Easily proved true

e. An idea proposed by a scientist

In science, a theory is a(n)

a. Educated guess

b. Inference based on a lack of scientific evidence

c. Idea with little experimental support

d. Body of scientifically acceptable general principles

e. Statement of fact