What are abiotic factors that spruce depends on?

Biotic abiotic factors

Abiotic and Biotic Factors in the Environment. Ecosystems are comprised of living and non-living components. In biology and ecology, these components are referred to as abiotic and biotic factors. These two types of factors are broad and disparate.

"griffith's experiment discovering the "transforming principle" in pneumococcus bacteria. griffith's experiment, reported in 1928 by frederick griffith, was the first experiment suggesting that bacteria are capable of transferring genetic information through a process known as transformation." - griffith's experiment.

the cladogram shown here shows similarities and differences among several classes of vertebrates. anatomically, the four have limb structure as their common ancestor. we might separate the mammals from the other three classes because they a) divergent; do not lay eggs b) identical; are warm-blooded c) varied; a four chambered heart d) homologous; have mammary glands