Question

which statement best explains why a eukaryotic cell is more complex than a prokaryotic cell?
a. a eukaryotic cell contains one circular chromosome which is not membrane-bound.
b. a eukaryotic cell lacks vacuoles and mitochondria, and the circular chromosomes are bound by a nuclear membrane.
c. a eukaryotic cell contains vacuoles and mitochondria, and the linear chromosomes are bound by a nuclear membrane.
d. a eukaryotic cell contains pairs of chromosomes, which are not membrane-bound.

Explanation:

Eukaryotic cells are defined by having a membrane-bound nucleus containing linear chromosomes, plus membrane-bound organelles like mitochondria and vacuoles, which prokaryotes lack. Option A describes prokaryotic traits. Option B incorrectly states eukaryotes lack vacuoles/mitochondria. Option D incorrectly says eukaryotic chromosomes are not membrane-bound. Only option C matches the key complex features of eukaryotic cells.

Answer:

C. A eukaryotic cell contains vacuoles and mitochondria, and the linear chromosomes are bound by a nuclear membrane.