<span>A: The proportions of a population that are at different age levels make up the population’s age structure. </span>
Answer:
To show the flow of energy through ecosystems, food chains are sometimes drawn as energy pyramids. Each step of the pyramid represents a different trophic level, starting with primary producers at the bottom. The width of each step represents the rate of energy flow through each trophic level.
Explanation:
Answer:wind has carried away the dry soil
Explanation:
It causes anemia thrombocytopenia and decreased neutrophil function. Anemia is caused by decreased erythropoitin
