Why is a tundra considered a desert?
How are ecosystems named?
A. by the climate it is associated with
B. by the plants that inhabit the ecosystem
C. by the surrounding city that is close by
D. by the surrounding country that is close by
What two factors are more important to grasslands?
A. photosynthesis and the water cycle
B. a good root system and the water cycle
C. photosynthesis and a good root system
D. a good root system and temperature
How are forest and grasslands maintained?
A. flood
B. drought
C. hurricane
D. fire
What are abiotic factors associated with ecosystems?
A. temperature, animals and soil nutrients
B. temperature, water and soil nutrients
C. water, soil nutrients and grass
D. water, shelter and animal life
Why is a tundra considered a desert?
A. lack of water
B. dry cold weather
C. plenty of flora
D. temperature
I'm a little confused about these questions. 
Comments
B. by the plants that inhabit the ecosystem (since all others are bad options)
C. photosynthesis and a good root system
D. fire
B. temperature, water and soil nutrients
B. dry cold weather