Question

Cyanophyceae or blue-green algae possess

• A. Definite nucleus but no plastid
• B. Definite plastid but no definite nucleus
• C. Definite nucleus and plastid
• D. Neither definite nucleus nor definite plastid

Answer 1

The correct option is D Neither definite nucleus nor definite plastid

Prokaryotes are unicellular organisms without membrane-bound organelles like mitochondria, chloroplasts, plastid. They also lack a definite nucleus. Instead, they possess nucleoid, genetic material without a nuclear envelope. Examples of prokaryotes include bacteria, Cyanophyceae (blue-green algae).

Thus, the correct answer is 'Neither definite nucleus nor definite plastid.'