Which phrases correspond to "spontaneous generation?"?

Response:

3. Life forms emerged from non-living organic substances.

4. Pasteur disproved this idea via a practical experiment.

Explanation:

"Spontaneous generation" alludes to an outdated theory regarding life's origins, positing that living beings emerged from organic, inanimate matter without requiring a parent. Aristotle was among the first to formally articulate this notion; however, later scientists like Francesco Redi and Lazzaro Spallanzani opposed it but lacked proof until Louis Pasteur intervened.

Louis Pasteur, a French chemist, refuted this theory through a series of experiments using 'swan-neck' flasks for boiling broth.

These flasks allowed oxygen entry while blocking access to microorganisms. In his initial experiment, the cooled broth was lifeless. However, when the neck of the flask was broken in the second experiment, it permitted life forms to grow. He concluded from these trials: "Life originates solely from life."

Response:

2 & 4

Explanation:

The concept of spontaneous generation proposed that life could arise from 'nothing.' This idea remained accepted until it was challenged by Francesco Redi and Luis Pasteur through experiments. Redi conducted an experiment where he placed cooked meat on two plates—one was covered with a glass bowl, while the other was left exposed. The covered plate did not develop maggots, but the open one did, indicating that maggots resulted from eggs laid by flies. Thus, life originates from pre-existing life.