Why do food chains in an ecosystem rarely contain more than five organisms?
a. nutrients are recycled by the decomposers back to the producers.
b. nutrients are lost from the ecosystem when organisms die.
c. the conversion of food into growth by an organism is not very efficient.
d. energy is recycled by the decomposers back to the producers.

identify the dna change shown in the diagram and explain how that change can result in the increased genetic diversity often seen among siblings.identify the dna change shown in the diagram and explain how that change can result in the increased genetic diversity often seen among siblings.v

if the type of the food available changes, then the frequency of beak types will change, because birds with beaks more suited to the available food will be more successful over time.