NEET BIOLOGY

Detailed explanation-1: -Prokaryotes were the earliest life forms, simple creatures that fed on carbon compounds that were accumulating in Earth’s early oceans. Slowly, other organisms evolved that used the Sun’s energy, along with compounds such as sulfides, to generate their own energy.

Detailed explanation-2: -The Microbial Eve: Our Oldest Ancestors Were Single-Celled Organisms. What scientists believe to be our oldest ancestor, the single-celled organism named LUCA, likely lived in extreme conditions where magma met water-in a setting similar to this one from Kilauea Volcano in Hawaii Volcanoes National Park.

Detailed explanation-3: -The first cells were most likely primitive prokaryotic-like cells, even more simplistic than these E. coli bacteria. The first cells were probably no more than organic compounds, such as a simplistic RNA, surrounded by a membrane.

Detailed explanation-4: -The first life on Earth was prokaryotic. Prokaryotic cell structure is much simpler. The domains Archaea and Bacteria are both prokaryotic, and evidence suggests that Archaea are most like the earliest prokaryotes.