How is cross pollination different from self pollination

According to the cladogram, which organisms have roundworms as a common ancestor?

Several bird species feed in a certain species of tree. each bird species feeds in a different part of the tree. which statement is true of these bird species? a. they have adapted to different niches due to competition b. they have a carnivorous relationship with the tree species. c. they have adapted to different niches due to predation d. they have a symbiotic relationship with the tree species.

Aplant may open end close its stomata to prevent excess water loss and maintain