if-plants-and-insects-existed-in-the-first-300-million-years-why-is-pollination-

Question

If plants and insects both existed for the first 300 million years after plants first evolved, why was pollination by insects not common in that period, as it is today?

Accepted Answer

because plants were dominated by non-flowering plants at that time

Answer

because insects at that time would not have been able to use nectar as food

Answer

because insects were flightless at the time

Answer

because nectars did not have a sweet taste at that time