Plants that flower once in their lifetime are known as
monoecious
dioecious
polycarpic
monocarpic

Monocarpic

Explanation:

A monocarpic plant can live years before flowering. Flowering does not by itself result in the death of the plant, but the production of fruits and seeds causes changes in it that will lead to death. These changes are induced by hormones that divert resources from the roots and leaves to the production of fruits and seeds.    

An example of this type of plants is Agave. This plant once it produces its fruit dies.

the most speciallized is b. grizzly bear

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.