Author Question: Large families in poor countries A) are rare, because having many children is expensive. B) are ... (Read 53 times)

Caiter2013 · **on:** Jul 16, 2018

Large families in poor countries

A) are rare, because having many children is expensive.
B) are common, due largely because of low infant and childhood mortality.
C) are common, in part because more children means more labor.
D) are becoming more common as the use of modern agriculture increases.

Question 2

The main difference between natural eutrophication and damaging cultural eutrophication is that in cultural eutrophication, the

A) speed of nutrient enrichment is much faster.
B) oxygen levels tend to be higher.
C) water tends to be clearer.
D) submerged aquatic vegetation is completely suppressed.