Plant and animal products are always renewable resources. True False Question 2
ID: 50092 • Letter: P
Question
Plant and animal products are always renewable resources.
True
False
Question 2
Select one answer.
10 points
Human activities are the only factors that can influence the Earth’s climate.
True
False
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 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 5
Select one answer.
10 points
Which option lists three important greenhouse gases?
O3 (ozone), CFCs, and SO2 (sulfur dioxide)
nitrogen gas (N2), oxygen gas (O2), and carbon dioxide (CO2)
carbon dioxide (CO2), methane (CH4), and nitrous oxide (N2O)
Question 6
Select one answer.
10 points
Which best Starting in the 1950s, populations of Atlantic cod were heavily fished by highly efficient commercial trawlers. Catches started to decline in the 1970s and by 1990 several of the fisheries were completely depleted. Was the cod population a renewable resource when fished at that level? how impact changes with development of technology?
Yes; plant and animal populations are always renewable resources.
No, because growth and reproduction of the fish couldn’t keep up with the harvest.
Question 7
Select one answer.
10 points
In a warming world, seasonal events are occurring earlier in spring and later in fall. Is this a significant problem?
Yes, because species respond differently. This can lead to mismatches between the life cycles of plants and pollinators, predators and prey, etc.
No, because all species are responding in the same way. The growing season is longer, so species are likely to benefit from this change.
Question 8
Select one answer.
10 points
Which of the following is renewable and biodegradable?
A plastic flip-flop
A metal knife
A wooden Popsicle stick
A glass window
None of the above
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
Question 10
Select all that apply.
10 points
Which of the following are common benefits that humans get from functioning natural ecosystems and the biodiversity that is found there? Select all that apply.
Grasslands and wetlands produce corn, wheat, rice and other grain crops.
Forests prevent landslides and help protect coastlines from storm surges and tsunamis.
Most natural ecosystem types provide recreational opportunities for hiking, wildlife watching, hunting, fishing, etc.
Mosquitoes and other disease vectors inhabit natural wetlands and forests.
Diverse species contain countless biomolecules that may be used as drugs or for other purposes.
Explanation / Answer
1. Plant and animal products are always renewable resources. True
Plant product like wood, leaves etc and animal products like cowdung cakes are renewable sources.
2. Human activities are the only factors that can influence the Earth’s climate. True
Human activities like increased industries, increased population, vehicles lead to increase pollution which influence Earth climate.
3. Which two activities are the main human activities that have led to increased levels of atmospheric carbon dioxide (CO2)?
Answer is breathing and decomposition, burning fossil fuels and clearing forests
Breathing and decomposition increases the level of CO2, fossil fuel are made of carbon. when carbon burns in oxygen it produces CO2. In forest, plant use CO2 and decreases the level of CO2 in atmosphere but when forest are cleared, they increases level of CO2
4. Which option lists three important greenhouse gases?
Answer. carbon dioxide (CO2), methane (CH4), and nitrous oxide (N2O)
These gases trap the infra red radiations coming from the sun and does not allow them to go back. Due to which temperature increases, which is known as green house effect.