Question

Rank the order in which the earliest organisms evolved.

Answer 1

The order in which the earliest organisms evolved -

• Archaea and bacteria
• Protists
• Fungi and shell-less invertebrates
• Green algae
• Shelled Invertebrates

On the earth, various kinds of organisms evolve at different geological times, and on their evolution, they consider the oldest or youngest organisms:

• Archaebacteria and bacteria was the oldest living organism on earth was, they lacked a membrane-bound nucleus and cell.

• The protists evolved after the bacteria, they were multicellular prokaryotic organisms.
• Fungi and the shell-less invertebrate, much-developed organisms in terms of body organization and structure. These have membrane-bound, well-defined cell membranes, and a nucleus. They even had a tissue level of organization.
• Green algae evolve after protists which belong to the division Thallophyta of the plant kingdom. These are photosynthetic as they have chlorophyll in the cell.
• Shelled Invertebrates are the youngest organisms that evolved recently among these.

Thus, the correct order is -

• Archaea and bacteria
• Protists
• Fungi and shell-less invertebrates
• Green algae
• Shelled Invertebrates

Learn more about geological time scale:

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