Question

comparing types of cells
students are comparing two organisms in the table below.

organism 1	organism 2
has complex structure	single - celled
multi - cellular	no nucleus
has a membrane - bound nucleus	has ribosomes

part b
which two statements support the answer to part a?
a all organisms have cells with circular dna
b all organisms have ribosomes
c only eukaryotic cells have ribosomes.
d only eukaryotic cells have a membrane - bound nucleus
e all organisms are single - celled

Explanation:

• All organisms have ribosomes as they are essential for protein - synthesis. Prokaryotes (like organism 2 which has circular DNA and no nucleus) also have ribosomes.
• Only eukaryotic cells have a membrane - bound nucleus. Organism 1 with a membrane - bound nucleus is eukaryotic and organism 2 without a nucleus is prokaryotic.

Answer:

B. All organisms have ribosomes
D. Only eukaryotic cells have a membrane - bound nucleus