Question 9 Select one answer. What is biodiversity? The variety of ecosystem typ
ID: 50081 • Letter: Q
Question
Question 9
Select one answer.
What is biodiversity?
The variety of ecosystem types present within a region
Variation within a population’s or species’ gene pool
The variety of life at all levels, including all of the other options.
Question 4
Select one answer.
10 points
Which two activities are the main human activities that have led to increased levels of atmospheric carbon dioxide (CO2)?
breathing and decomposition
burning fossil fuels and clearing forests
livestock production and rice paddy agriculture
fertilizer use and natural gas extraction
Question 3
Select one answer.
10 points
The following are estimates from the U.S. Census Bureau’s International Database. They are averages for populations in two different groups of countries in 2012.
Group A: Total fertility 1.6 births per woman over a lifetime, life expectancy 78 years at birth, and population growth rate 0.3 % per year.
Group B: Total fertility 2.6 births per woman over a lifetime, life expectancy 66 years at birth, and population growth rate 1.3 % per year.
Which group do you think are the less developed countries, including most of Africa, Asia, and Latin America?
Group A nations are the less developed (lower income) nations.
Group B nations are the less developed (lower income) nations.
Question 9
Select one answer.
10 points
What is biodiversity?
The variety of ecosystem types present within a region
Variation within a population’s or species’ gene pool
The variety of life at all levels, including all of the other options
Explanation / Answer
1. The variety of life at all levels, including all of the other options.
Biodiversity is the variety of different types of life present on Earth, which refers to species variation, genetic variation and ecosystem variation within a region of Earth.
2. burning fossil fuels and clearing forests - increases atmospheric CO2 levels
livestock production and rice paddy agriculture - Increases atmospheric CO2 levels.