Question

question 1 - 18
allison has a sealed petri - dish each with a single cell in it. every 6 hours for the next 2 days she counts the number of cells in her petri - dish. her data is listed as the table below.
what part of cell theory was allisons experiment most likely about?
the cells grown in a petri - dish will only survive for 48 hours.
single - celled organisms can grow in a petri - dish.
the number of cells grown in a petri - dish doubles every 6 hours.
the cells grown in a petri - dish all come from preexisting cells.

Explanation:

Step1: Recall cell - theory principles

Cell - theory states that all cells come from pre - existing cells. In Allison's experiment, the cells in the petri dish are growing and dividing. The data shows an increase in the number of cells over time.

Step2: Analyze the options

1. "The cells grown in a petri dish will only survive for 48 hours" is incorrect as the data shows cell growth beyond 48 hours.
2. "Single - celled organisms can grow in a petri dish" is a general statement but not the most relevant part of cell theory here.
3. "The number of cells grown in a petri dish doubles every 6 hours" is a pattern observed in the data but not a fundamental part of cell theory.
4. "The cells grown in a petri dish all come from pre - existing cells" is in line with the cell - theory principle that all cells arise from pre - existing cells.

Answer:

The cells grown in a petri dish all come from pre - existing cells.