No.
(See related question below, "What is the most abundant form of life on Earth?").
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Yes, insects are often considered the most numerous group of organisms on Earth in terms of species diversity. It's estimated that there are around 1 million described insect species, with potentially millions more awaiting discovery. Insects are found in almost every ecosystem, playing crucial roles in various ecological processes.
Cyanobacteria. was a late arrival.No one know what the first cells were nor do we understand their chemistry,but the most likely candidates were self reproducing proteins (like prions) somehow bound together.
The most abundant animal in the world is thought to be the nematode, also known as roundworms. Nematodes are found in virtually every environment on Earth, from the depths of the ocean to the soil in your backyard. With estimates of hundreds of thousands of species, they are incredibly diverse and outnumber all other animals in terms of sheer numbers.
Phytophagous insects are insects that primarily feed on plants for sustenance. They can cause damage to crops and vegetation by consuming plant materials such as leaves, stems, fruits, and roots. Some examples of phytophagous insects include beetles, caterpillars, and aphids.
The shortest lifespan of an animal is around 24 hours for mayflies, which are known for their brief adult lifespan.
Most of the living species known to science are insects. They make up a majority of the Earth's known species due to their incredible diversity and sheer numbers. Insects play a crucial role in ecosystems around the world.