B. eukaryotic cells contain organelles that are enclosed in membranes
<span>The correct answer is c. Rural communities were built based on the location of available resources. This means that places that had good land for crops or good climate had communities based around crops or tobacco, while comunities based around mining would be near mountains where mines could be found. Rural communities are usually based around some natural resource like a river or a mine or anything similar.</span>
<span>The statement' microorganism and humus have little impacts on soil health is false. Soil microbes and humus have huge impact on soil health and they are the principal determinants of a particular soil fertility. Humus are dead organic materials which provide essential and needed nutrients that soil needs to be fertile. These needed nutrients can not be available for plant use unless the soil microbes break them down and release the nutriets for soil use. Thus, humus and soil microbes have important roles to play in soil health.</span>
Answer:
D
They occur in the thylakoid membranes of the chloroplast.