Which of the following lists include only biotic parts of an ecosystem? A. Rain, Grass, Seeds, Mice
B. Sand, Air, Water, Sunlight
C. Log, Dead Grass, Fungi, Bird
D. Bacteria, Soil, Minerals, Worms

The answer is C, all are alive or have been alive.

good one: produce hormones that plants grow.

bad one: the problem with organic matter is that while plant nutrients are needed for crop growth, they can also stimulate excessive growth of the wrong plants – mainly, algae.

italy's population growth rate is almost at zero, the national statistics agency, istat, said on monday, mainly due to a dwindling birth rate.