1. the plant life that is characteristic of a biome depends upon:
a. the type of soil
b. the range of temperatures
c. the amount and pattern of precipitation
d. all of the above

D. all of the above

Explanation:

Biome refers to a large and relatively distinct terrestrial region having similar climatic conditions regardless of where it occurs on Earth. The characteristic climatic conditions (temperature and precipitation being the most important ones) and soil type of each biome type determine the type of plant species found there. Therefore, each biome is characterized by specific flora.  

For example, a desert biome is a temperate or tropical biome characterized by a lack of precipitation, seasonal variations in temperature and poor soil type with low organic matter that limits plant growth. Desert biomes have only the plant species that can survive these harsh conditions.  

acceleration = 18/3 = 6 m/s per second.

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-lavira: )