What is desertification?a.method of using desert land for agricultureb.the process of turning arable land into desertsc.drying up of stream beds and lakes d.the expansion of current deserts land areas
Fluctuations in the phosphorus cycle in aquatic ecosystems _______.a.can lead to changes in the growth rates of aquatic populationsb.are never caused by human impact on the environmentc.lead to a decrease in the amount of phosphorus found in sedimentd.never occur naturally
Where do animals obtain carbon?a.the atmosphereb.plant and animal consumptionc.the soild.photosynthesis
The desert relies on precipitation from weather patterns, while the rainforest can create its own precipitation.
Phosphorus is contained in _______. a. living organisms b. soil c. bodies of water d. all of the above Please select the best answer from the choices provided
Phosphorus plays an important role within the structures of the body. Which of the following structures is phosphorus found in? a. bones b. cell membranes c. DNA d. all of the above Please select the best answer from the choices provided
One reason that rainforests have more precipitation than deserts is _______.a.plants in the desert experience a large amount of transpirationb.plants in the rainforest release a large amount of water to the atmospherec.plants in the rainforest experience a small amount of transpirationd.the fewer plants an area has, the smaller the amount of transpiration there is
Cycles are essential to all living organisms.
Plants in the rainforest _______.a.effectively conserve and retain water b.have low levels of transpirationc.release 50-80% of their water back into the ecosystemd.are adapted to conditions of drought
Fertilizer runoff has a negative impact on aquatic ecosystems because _______.a.it causes plants and algae to grow quickly, suffocating organisms in the waterb.phosphorus is not found in naturec.phosphorus is poisonous to living organismsd.living organisms do not require phosphorus in order to survive
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