Question

1. robert hooke, antian van leeuwenhoek, theodor schwann, rudolf virchow, and matthias schleiden were all responsible for what theory?

a. the theory of gravity
b. the cell theory
c. the theory of relativity

1. all living things are made up of....

a. cell
b. organs
b. organs systems

1. all cells come from______cells.

a. pregnant cells
b. pre - existing cells
c. lava cells

Explanation:

• Question 20: Robert Hooke, Anton van Leeuwenhoek, Theodor Schwann, Rudolf Virchow, and Matthias Schleiden are key figures in the development of the Cell Theory. Hooke first used the term "cell", Leeuwenhoek made important microscopic observations, Schleiden and Schwann formulated parts of the theory, and Virchow added the idea that cells come from pre - existing cells. The Theory of Gravity is associated with Newton, and the Theory of Relativity with Einstein.
• Question 21: The Cell Theory states that all living things are made up of cells. Organs are made up of tissues which are made up of cells, and organ systems are made up of organs.
• Question 22: According to the Cell Theory (specifically Virchow's contribution), all cells come from pre - existing cells. There is no biological concept of "pregnant cells" in this context, and "lava cells" is a non - biological and incorrect term.

Answer:

1. B. The Cell Theory
2. A. Cell
3. B. Pre - existing cells