Question

what are the 3 parts of the cell theory?
definition\tpicture to help you remember
1.\t
2.\t
3.\t
why is cell theory considered a theory and not a law?
theory explain why
law states what
practice eoc questions:
______4. a scientist is examining a slide of pond water. she finds an organism that creates glucose in the presence of light, reproduces, requires co2 to survive, is single celled, and is motile with the use of a flagellum. which of these characteristics gives evidence that this organism fits into the modern cell theory? (sc.912.l.14.1)
\ta. requires co2 to survive\tc. is motile with the use of flagellum
\tb. creates glucose in the presence of light\td. is composed of one cell
______5. which of these statements is a principle of the cell theory that supports the idea that new cells will replace damaged cells in a scraped knee?
\ta. all living things are composed of one or more cells.
\tb. cells are the basic unit of structure and function of all living things.
\tc. all cells arise from previously existing cells.
\td. most cells are too small to be viewed with the unaided eye.
______6. which idea is not supported by the cell theory?
\ta. living things can spontaneously generate from non-living things
\tb. fungi are made of cells
\tc. new hair cells are created from previous hair cells
\td. the cell is the basic unit of structure in a plant

Explanation:

Part 1: 3 Parts of the Cell Theory

The three parts of the cell theory are:

1. All living organisms are composed of one or more cells. (The picture with "animal cell" and "plant cells" hints at organisms being made of cells.)
2. The cell is the basic unit of structure and function in living organisms. (The connected circles might represent how cells form the basic structural and functional unit.)
3. All cells arise from pre - existing cells. (The group of circles labeled "= life" and the idea of cell origin from existing cells.)

Part 2: Why Cell Theory is a Theory, Not a Law

A scientific theory explains why a natural phenomenon occurs, while a law describes what happens. The cell theory explains the fundamental role of cells in life (how life is organized, how cells originate, etc.). A law, like the law of gravity, just states a consistent observation (e.g., objects fall towards Earth) without explaining the underlying "why" (the theory of gravity explains the mechanism). So cell theory is a theory because it provides an explanatory framework for cellular life, not just a descriptive statement.

Practice EOC Questions

Question 4

The modern cell theory has three main principles (organisms are made of cells, cells are the basic unit, cells come from pre - existing cells). The characteristic that shows the organism fits the cell theory is being composed of one cell (option d). The other options (requiring CO₂, making glucose, being motile) are specific to the organism's metabolism or movement, not core cell theory principles.

Question 5

To replace damaged cells in a scraped knee, new cells must come from existing cells. The principle "All cells arise from previously existing cells" (option c) supports this. Option a is about the composition of living things, option b is about the cell as a basic unit, and option d is a fact about cell size, not related to cell replacement.

Question 6

The cell theory states that all living things are made of cells, cells come from pre - existing cells, and the cell is the basic unit of structure/function. The idea that "Living things can spontaneously generate from non - living things" (option a) is not supported by cell theory, as cell theory says cells come from pre - existing cells, contradicting spontaneous generation.

Answer:

s

1. All living organisms are composed of one or more cells.
2. The cell is the basic unit of structure and function in living organisms.
3. All cells arise from pre - existing cells.

1. d. Is composed of one cell
2. c. All cells arise from previously existing cells.
3. a. Living things can spontaneously generate from non - living things