EVERYDAY SCIENCE

SCIENCE

BOTANY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
The first organisms on earth that were photosynthetic were ____
A
sea plants like kelp
B
photosynthetic bacteria
C
red algae
D
green algae
Explanation: 

Detailed explanation-1: -So the correct answer is “Cyanobacteria".

Detailed explanation-2: -So, the correct answer is ‘Cyanobacteria’.

Detailed explanation-3: -A new study by an Imperial researcher suggests that this more primitive form of photosynthesis evolved in much more ancient bacteria than scientists had imagined, more than 3.5 billion years ago.

Detailed explanation-4: -The earliest life forms we know of were microscopic organisms (microbes) that left signals of their presence in rocks about 3.7 billion years old. The signals consisted of a type of carbon molecule that is produced by living things.

Detailed explanation-5: -Within the prokaryotic domain, there are five main groups of bacteria that perform tetrapyrrole-based photosynthesis. They are proteobacteria (also known as purple bacteria), heliobacteria, Chloroflexi (filamentous bacteria also known as green non-sulfur bacteria), Chlorobi (green sulfur bacteria) and cyanobacteria.

There is 1 question to complete.