Biogeochemical cycles . A) are not essential for life
B) move through abiotic and biotic regions
C) are the result of natural disasters
D) provide the greatest amount of energy for the Earth

The health, management and conservation of biodiversity, is a challenge facing ecosystems worldwide. the major factors that affect the health and function of the great barrier reef are climate change and pollution. which question investigates the effects of a biotic factor on the reef ecosystem?

One of the reasons that stars are so large is because

What changes the stability of the element