Question

1. the cell theory was first proposed in 1838. evidence obtained through additional scientific investigations resulted in the current cell theory. which statement describes a component of the original cell theory that was removed because of the new scientific knowledge?

o a. all living things are made of cells
b. all cells come from preexisting cells
c. cells form through spontaneous generation
d. cells are the basic functional and structural units of life

1. a scientist studying new life discovers a new organism. she studies it under the microscope and draws a diagram of what she sees. which of the following best describes the newly discovered organisms?

o a. the organism is eukaryotic, because it has a nucleus.
b. the organism is prokaryotic, because it has a cell membrane.
c. the organism is prokaryotic, because it has cytoplasm.
d. the organism is eukaryotic, because it has cilia.

Explanation:

Question 2

The original cell theory had an incorrect component about cells forming through spontaneous generation. Spontaneous generation was later disproven. The other options (a, b, d) are still valid parts of the modern cell theory.

Prokaryotic cells lack a nucleus. Eukaryotic cells have a nucleus. Since the organism in the diagram has a nucleus, it is eukaryotic. Having a cell membrane (all cells have one) or cytoplasm (all cells have this too) doesn't distinguish between prokaryotic and eukaryotic. Cilia are not the defining feature for eukaryotic cells (though some eukaryotes have them). The presence of a nucleus is the key.

Answer:

C. Cells form through spontaneous generation

Question 10