Question

1. which type(s) of cells have genetic material that is contained in a nucleus? *

a. bacteria
b. plants
c. animals
d. both plant and animal cells

1. which of the following statements describes how the prokaryotic cells appear * compared to the eukaryotic cells?

a. the prokaryotic cells are much smaller than eukaryotic cells.
b. the prokaryotic cells have cytoplasm, and eukaryotic cells do not.
c. the prokaryotic cells have cell membranes, while the eukaryotic cells do not.
d. the prokaryotic cells have a nucleus, while the eukaryotic cells do not.

1. all unicellular organisms *

a. are prokaryotes
b. are bacteria
c. reproduce
d. have a nucleus

Explanation:

• Question 12: Bacteria are prokaryotes with no nucleus. Plant and animal cells are eukaryotes with a nucleus. So both plant and animal cells (d) have genetic material in a nucleus.
• Question 18: Prokaryotic cells are generally smaller than eukaryotic cells. Both have cytoplasm and cell membranes. Prokaryotes lack a nucleus. So (a) is correct.
• Question 17: Not all unicellular organisms are prokaryotes (e.g., some protists are unicellular eukaryotes). Not all are bacteria. Unicellular organisms reproduce. Some (prokaryotes) lack a nucleus. So (c) is correct.

Answer:

1. d. Both plant and animal cells
2. a. The prokaryotic cells are much smaller than eukaryotic cells
3. c. Reproduce