CURRENT AFFAIRS

Detailed explanation-1: -The first animal to appear on Earth was very likely the simple sea sponge. New genetic analyses led by MIT researchers confirm that sea sponges are the source of a curious molecule found in rocks that are 640 million years old.

Detailed explanation-2: -The First Animals Sponges were among the earliest animals. While chemical compounds from sponges are preserved in rocks as old as 700 million years, molecular evidence points to sponges developing even earlier.

Detailed explanation-3: -A comb jelly. The evolutionary history of the comb jelly has revealed surprising clues about Earth’s first animal.

Detailed explanation-4: -Millipedes: The First Land Animals.

Detailed explanation-5: -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.