Question

The first formed cells on the primordial earth were
(a)Autotrophic
(b)Parasitic
(c) Prokaryotic and Heterotrophic
(d) Prokaryotic and Autotrophic

Answer 1

Hint: The first formed cell consisted of little more than an organic molecule such as RNA with no nuclear membrane. Organic compounds such as carbon sources were mainly utilized for metabolism.

Complete answer:
One cell (or group of cells), called the last universal common ancestor (LUCA), is known to give rise to all subsequent life on Earth.
Prokaryotes were among the earliest life forms on Earth. This group mainly consisted of simple creatures with no organelles and significant nuclear envelope. They generally feed on carbon compounds that were accumulating in Earth’s early oceans. Slowly, other organisms also evolved that used the Sun’s energy as an alternative to suffice metabolic needs and also used compounds such as sulfides, to generate their own energy. Due to evolution some organisms also started to utilize water during photosynthesis, releasing oxygen as a by-product. Over the course of time, enough oxygen got accumulated in Earth’s atmosphere to allow for the evolution of oxygen-metabolizing organisms.

Additional Information: Cyanobacteria, also known as blue-green algae, were among the first to start out on Earth. Possible fossil examples have been found in the rocks that are around 3500 million years old around Western Australia.
Although they are commonly referred to as blue-green algae, they are not actually algae. Cyanobacteria, and bacteria together in general, are prokaryotic life forms. This basically means that their cells don’t contain organelles and do not have distinct nuclei this means their genetic material mixes in with the rest of the cell. On one hand, this characteristic is distinctive of bacteria and archaea as all other life forms on Earth, including real algae, consist of eukaryotic cells with organelles and with genetic material in the nucleus.
So, the correct answer is Prokaryotic and Heterotrophic.

Note: The first life form to appear on earth was a bacterium that was basically a prokaryotic cell that originated from protocell in the Archaeozoic era (3800 million years ago. Additionally, they were free anaerobic chemoheterotrophs and used the organic component as a source of energy.