Systems of the Biosphere Answers

Sunlight can be considered a food resource.

Which of the following factors might be affected by a wildfire?a.foodb.shelterc.biodiversityd.all of the above

Which of the following scenarios represents change to an ecosystem brought about by biotic factors?a.a wildfire caused by lightning striking a treeb.a flood caused by a severe stormc.a landslide caused by cattle overgrazingd.a volcano

Arrange the events of succession after a volcano erupted in their proper order. a. pioneer species, plant growth, soil formation b. pioneer species, soil formation, plant growth c. soil formation, pioneer species, plant growth d. soil formation, plant growth, pioneer species Please select the best answer from the choices provided

An ecosystem has experienced a recent decrease in its plant populations. Which of the following is a possible reason for the decline?a.an increase in the number of predatorsb.a decrease in the number of preyc.a decrease in the available waterd.an increase in the available land space

Secondary succession can only occur as a transition from primary succession.

Which of the following would be considered a limited resource in the lower depths of the ocean?a.waterb.sunlightc.preyd.predators

What types of organisms will be affected by a decreased supply of water in an ecosystem?a.Producers, consumers, and decomposers will be affected.b.Producers and consumers will be affected.c.Consumers and decomposers will be affected.d.No organisms will be affected.

Suppose a group of bobcats that normally live and hunt in the tops of mountains, start hunting prey at the base of the mountain and move into the valley below. Which of the following will most likely happen to the prey in the valley?a.Their numbers will soon increase.b.Their numbers will soon decrease.c.They will move to the tops of the mountains.d.They will remain unchanged.

Pioneer species survive by living on rocks and minerals.