Multiple choice general knowledge science & technology

Which is the following microorganism said to be evolved first?

  1. Brown Algae

  2. Green Algae

  3. Red Algae

  4. Blue Green Algae
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Blue-green algae (cyanobacteria) are considered the most evolutionarily primitive because they were among the first photosynthetic organisms on Earth, appearing around 3.5 billion years ago. They produced oxygen through photosynthesis and fundamentally changed Earth's atmosphere.

Keep practicing — related questions