Biological Classification And System Of Classification Question 20
Question: The fossil record of blue-green algae is in
Options:
A) Palaeozoic
B) Pre-palaeozoic
C) Carboniferous
D) None of these
Show Answer
Answer:
Correct Answer: B
Solution:
Blue-green algae, also known as cyanobacteria, are among the oldest known photoautotrophic organisms that release oxygen during their photosynthesis.
The fossil record of cyanobacteria extends far back into the Precambrian. The oldest cyanobacteria-like fossils known are nearly 3.5 billion years old, among the oldest fossils currently known2.
Therefore, the fossil record of blue-green algae is in the Pre-Palaeozoic era. Hence, the correct answer is B) Pre-Palaeozoic.
BETA
