5.2-5.3 IB Quiz

1.

1 point

According to the precautionary principle, what should happen if there are fears that eating a food might cause a health problem?

The company producing the food should be warned about the possible health problem.

The company producing the food should test the food to prove that it does not cause a health problem.

People should be warned about the possible health problem.

People who have fears about the food should test it to see if it causes a real health problem.

2.

1 point

If natality is slightly larger than mortality, and immigration is much larger than emigration, what will happen to the size of a population?

It will increase

It will fluctuate up and down

It will decrease

It will remain constant

3.

1 point

Which group of organisms in the carbon cycle converts carbon into a form that is available to primary consumers?

decomposers

saprotrophs

detritus feeders

producers

4.

1 point

Why does the amount of CO2 fall between April and August in the Northern Hemisphere?

Seasonal decrease in the rate of photosynthesis in the northern hemisphere forests

Seasonal increase in the amount of CO2 dissolved in the oceans

Seasonal increase in the rate of photosynthesis in the northern hemisphere forests

Seasonal decrease in the rate of fossil fuel consumption

5.

1 point

Which of the following is the best definition of a population?

A group of individuals that can interbreed and produce fertile offspring

A group of species living and interacting with each other in a given area

The number of individuals of the same species in a given area

The total number of individuals in a given area

6.

1 point

Several greenhouse gases occur in the atmosphere. Carbon dioxide (CO2) is one of them but so are methane (CH4) and oxides of nitrogen (NOx).
Why are oxides of nitrogen classed as greenhouse gases?

They are only produced by human activity whereas CO2 and CH4 are also produced naturally.

They dissolve in rainwater to produce acid rain.

They trap some of the long-wave radiation emitted by the Earth’s surface.

They prevent short-wave radiation from reaching the Earth’s surface.

7.

1 point

Which of the following is a consequence of global temperature rise on arctic ecosystems?

Decrease of pest species and increase of permafrost species

Decrease of geographical range of habitats for temperate species

Increase of geographical range of habitats for permafrost species

Increased rates of decomposition of detritus trapped in permafrost

8.

1 point

Population size is influenced by certain factors.
If I = immigration, E = emigration, N = natality, M = mortality and (N + M) = (I + E) = 0, which phase is this population in?

Transitional Phase

Plateau Phase

Growth Phase

Exponential Phase

9.

1 point

Global warming threatens the survival of Arctic foxes. Which of the following factors could be involved?
I. Competition with other fox species spreading north
II. Reduction in numbers of prey species of Arctic foxes
III. Decrease in oxygen availability to Arctic foxes

I, II, and III

II and III only

I and II only

I only

10.

1 point

The population of white-tailed deer in Nova Scotia (Canada) suffered a significant decline in the late 1970s. Which of the following is most likely to have caused the decline?

The population had depleted resources in the environment

A decrease in predation

Natality and immigration exceeded mortality and emigration

A decrease in hunting

11.

1 point

What can limit increases in population size?
I. Decrease in prey
II. Decrease in parasites
III. Increase in predators

I and II only

II and III only

I and III only

I, II, and III

12.

1 point

Which gas will enhance the greenhouse effect if released into the atmosphere?

Hydrogen

Oxygen

Oxides of Nitrogen

Nitrogen