19. which of the following is an example of a climax community?
a. flowers growing after the burning of a forest fire
b. the first shrubs that appear a volcanic eruption
c. return of animals after the flooding from a hurricane
d. the organisms present after a 200 year period in a rainforest

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.

The carbon cycle is best defined as a process in which a. carbon changes from inorganic forms to organic forms and back b. carbon is changed into other elements such as oxygen or nitrogen c. carbon is continually created from the sun’s energy by plants d. carbon is consumed and regenerated from other elements such as oxygen and nitrogen

Which of the following particles always has a positive charge? a. electronb. neutron c. proton d. ion