How does seed dispersal in angiosperms differ from seed dispersal in gymnosperms

Some birds look for food near cattle and other livestock. the movement of the cattle churns up the ground, making insects available to the birds. the cattle appear to be unaffected by the presence of the birds. what kind of relationship exists between the birds and the cattle? o a. parasitism o b. commensalism o c. predation o d. mutualism

Which of the following is a good strategy when it comes to desserts

In the ocean why are the greatest amount of primary producers found in the epipelagic zone and how does that affect biodiversity