Question

from how many years cockroach are remained unchanged on earth​

Answer 1

Answer:

Cockroaches have incomplete metamorphosis, meaning that the nymphs are generally similar to the adults, except for undeveloped wings and genitalia. Development is generally slow, and may take a few months to over a year. The adults are also long-lived, and have survived for as much as four years in the laboratory.

Answer 2

Answer:

Cockroaches have not evolved for 250 million years and they have not changed a bit since then. Here is our response to this: No, that is not true. Every single species evolves for as long as it exists, but the pace of evolution may be different for different species.