The various organisms on earth are part of complex
symbiotic communities known as ecosystems. We are not only producing
by-products required by the others, such as CO2 or O2,
but we are also part of a food chain and will be consumed for food subsequent to
our death.
Plants
produce fuels using energy obtained from sun light. Consumers rely on
these fuels, and decomposers are required to make the organic substrate
plants require to grow. Life on earth requires the simultaneous
coexistence of many kinds of organisms. Our ecosystem exists as a stable
balance between communities of microbes, plants, insects, animals etc.
Life on earth may fail entirely if any of these major groups of organism
were to go extinct. Evolutionists believe that all life on earth evolved
from a single common ancestor, but the Bible says that God
created these many kinds of organisms almost simultaneously and
thereby accomplished what remains a requirement.
For a food chain to function we must all be made of
the same building blocks and store biochemical energy that is usable by
the other consumers. It is for this reason that we share a common design.
We were designed with the same biochemical systems so we can each provide
these components. All cells use the same system of DNA and protein, and
can therefore serve as a source the amino acid and nucleotide building
blocks required by another. We also share the same basic metabolic
pathways that produce or breakdown macromolecules and possess the
cofactors required for these processes. However, because of these core
similarities, the scientific community assumes all life on earth has
evolved from a single ancestral cell. They
deliberately ignore the fact that life on earth requires a simultaneous
existence of many organisms. This concomitant presence of many lifeforms
clearly supports what the Bible says; that God created many "kinds" of
organisms over the course of a few days. Instead, evolution is an attempt to offer
a purely natural explanation for the existence of an ecosystem that could
only result from intelligent design.