Which of the following was the most significant limiting factor in human population growth in the 20th century?

Which of the following was the most significant limiting factor in human population growth in the 20th century?

A) clean water
B)non-HIV disease
C)HIV
D)genocide
E)famine


Answer: A

Which of the following areas of study focuses on the exchange of energy, organisms, and materials between ecosystems?

Which of the following areas of study focuses on the exchange of energy, organisms, and materials between ecosystems?

A)organismal ecology
B)landscape ecology
C)community ecology
D)ecosystem ecology
E)population ecology




Answer: E