Salmon begin life in freshwater streams. as they mature, they swim towards the ocean to spawn. they must change physically over several months before they reach the ocean in order to be able to survive there.

When does dna replication(make a copy of itself)?

Place the steps tor the formation of the enzyme pepsinogen in correct order

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.