Food production increases of the past 30 years have been attributed to either increases in areas of land under cultivation or increases in yields per hectare. In which region has the proportion of increased food supply attributed to increased areas under cultivation been the highest?
A) Middle East/North Africa
B) South America
C) Subsaharan Africa
D) East Asia
E) South Asia
Question 2
Which of the following are not among the major constraints on increasing food production per capita in Africa?
A) Food producing areas are far from population centers.
B) Insufficient area of productive soils
C) Erratic rainfall distribution and frequent droughts
D) Fertilizer use is very low.
E) Very rapid increases in human population numbers
Spinal cord—levels of injury; A, areas of sensory function (dermatomes); B, areas of motor function.
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The cranium of early African H. erectus KNM-ER 3733 is nearly 1.8 million years old.
World Population Growth, Past 10,000 years
Change in Bone Mass over Time In your early years, more bone mass is added than lost in your body
No gene interaction in the production of feather color in budgerigar parakeets