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?

How do springtails help the moss plants in their egg fertilization?

A short non-vascular plant evolved into a tall plant with an efficient water conducting system 420 million years ago. Which of the following statements about the later form of this plant do you believe is correct?

In the alternation of generations observed in nonvascular plants, what is the primary function of the sporophyte?

In a nonvascular plant like moss, which life stage is dominant and most visible?