Why are plants in the alpine biome typically low growing?
a. they have limited access to nutrients.
b. they have limited access to sunlight.
c. they have too much access to water.
d. the have access to nutrient-rich soil.

a.They have limited access to nutrients.

Explanation:

The alpine biome is located in the high altitude regions of Andes, Alps and Rocky mountains. The weather conditions are windy and cold. The sunlight is typically intense in these regions. These biomes receives very little precipitations. The soil is nutrient poor because the decomposition rate of plant and animal dead matter is slow. Due to lack of proper nourishment and harsh winter conditions the plants are low growing in the alpine biome.

from my research i have to the conclusion that decomposers, such as fungi, bacteria and invertebrates, play a critical role in nutrient cycling and without them the earth's ecosystem may not support life as we know it. elements such as carbon, nitrogen and phosphorus exist in limited amounts on earth, although huge amounts of carbon are being released into the atmosphere from underground sources now by humans. it is still extremely important that other nutrients be retained by the process of re-use. decomposers are organisms that are able to chemically break down dead material and make these elements available for use by other organisms. without this breakdown of dead material, dead bodies would pile up. so decomposers also play a role in clean up also. without them, life might not continue as we know it and dead material would overwhelm the earth.    

what statement best describes the difference between the sympathetic and parasympathetic nervous systems?

the sympathetic nervous system prepares the body for intense physical activity and is often referred to as the fight-or-flight response. the parasympathetic nervous system has almost the exact opposite effect and relaxes the body and inhibits or slows many high energy functions.