wiz-icon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

Life originated how many years ago?

A
8 billion years ago
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
6 billion years ago
No worries! We‘ve got your back. Try BYJU‘S free classes today!
C
4 billion years ago
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
D
1 billion years ago
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is C 4 billion years ago
Origin of earth dated back around 4.6 billion year ago which makes options A and B incorrect as life originated only after origin of earth. The period of 4.6 billion year ago to 3.8 billion years ago is termed as Azoic era when the primitive earth conditions were too harsh to sustain any life form. During this period, the earth temperature cooled down and ocean and atmosphere were formed. The Archaeozoic era is marked by appearance of first life form in hot soup of primitive ocean which dates back around 4 billion years ago. The first life forms were prokaryotic chemoheterotrophic anaerobic organisms.
Therefore, the correct answer is option C.

flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Theories of Evolution
BIOLOGY
Watch in App
Join BYJU'S Learning Program
CrossIcon