Conservation

Give one example of a non-renewable resource.

Feb/March 2019

Fig. 5.1 shows a photograph of a giant panda.

Feb/March 2020

In 1970, the mass of Atlantic cod was 8 000 000 tonnes. State one year in which the mass of Atlantic cod was half of this amount.

Feb/March 2020

There are several ways to conserve fish stocks. Which conservation method makes it so that mostly large fish are caught?

Feb/March 2023

Which conservation methods are employed to safeguard endangered species?

Feb/March 2025

Microplastics are plastic fragments with a diameter of less than 0.5 cm. Fig. 6.1 shows the mass of microplastics in the oceans from 2000 to 2040.

Feb/March 2025

Fig. 2.1 illustrates a scientific project in which tomato plants and fish are raised together inside the same glasshouse. The labels in Fig. 2.1 state: water vapour is condensed, collected and returned to the fish tank; fish are fed on plant-based food; fish waste products are filtered and used as fertiliser for tomato plants; temperature kept at 27 ^{\circ}C; sunlight; solar panels supply power for heating; tomato plants give off water vapour; glasshouse.

May/June 2016

Fig. 4.1 shows a photograph of a yellow-shouldered Amazon, Amazona barbadensis, which is a parrot species found on the Caribbean coast of Venezuela.

May/June 2017

What is one example of sustainable development?

May/June 2018

What is capable of being managed in a sustainable way?

May/June 2019

Fig. 8.1 shows a stretch of land from which the trees have been removed.

May/June 2021

State other causes that could make a plant species become endangered.

May/June 2021

There are three rhinoceros species in Asia. Fig. 4.1 depicts an Indian rhinoceros, Rhinoceros unicornis, inside a national park, watched by tourists who are travelling on an elephant. The International Union for Conservation of Nature (IUCN) gathers data on animal species and sorts them into categories according to estimated numbers. Table 4.1 gives a summary of the conservation status of the three rhinoceros species, using the information available in 2020.

May/June 2021

What is one reason for conserving plant species?

May/June 2022

What is one reason for conserving plant species?

May/June 2022

What is one reason for conserving plant species?

May/June 2022

The Mulanje cedar, Widdringtonia whytei, is Malawi's national tree. This tree species grows naturally only on Mount Mulanje in Malawi. A large number of the trees have been cut too heavily or damaged by wildfires, which has led to deforestation, as shown in Fig. 5.1.

May/June 2022

Over the last 50 years, the number of Atlantic bluefin tuna fish in the Atlantic Ocean has fallen greatly. Which method would lead to the greatest improvement in conserving tuna fish stocks?

May/June 2023

Use the information in Fig. 6.1 to state which 10-year span showed the greatest rise in the percentage of land covered by forest.

May/June 2023

Which row indicates whether the two natural resources are managed sustainably at all times?

May/June 2024

State two reasons why organisms become endangered.

May/June 2024

Lignin is used to produce a sustainable material called bioplastic. Why is bioplastic regarded as a sustainable resource?

May/June 2024

What is one method by which endangered species can be conserved?

May/June 2025

Which practice helps preserve biodiversity?

May/June 2025

What term is used to refer to the number of different species living in an area?

May/June 2025

When fish stocks are managed as a sustainable resource, what is one reason for catching only the larger fish of a given species?

May/June 2025

Which of the following is not a reason for having conservation programmes?

Oct/Nov 2016

Trout and other fish were once caught commercially in Canada’s Great Lakes. But canals constructed between the lakes before 1900 let a predator, the lamprey, get into the lakes. The lamprey feeds on trout, so the fishing industry collapsed. Fig. 5.1 displays fish catches across 65 years.

Oct/Nov 2016

Define the term sustainable resource.

Oct/Nov 2016

Giant tortoises are an endangered species found on the Galapagos Islands, 600 miles from the coast of South America. Fig. 7.1 depicts a giant tortoise.

Oct/Nov 2016

Wetlands are ecosystems of international importance. The spoon-billed sandpiper, Calidris pygmaea, is an endangered species.

Oct/Nov 2016

Which of the following is not a reason for conservation programmes?

Oct/Nov 2017

What is employed to help maintain fish stocks?

Oct/Nov 2017

The Canadian Government was worried about overfishing in the Grand Banks in the Atlantic Ocean. Therefore, commercial fish stocks were tracked from 2002 to 2013. The population figures for four fish species are shown in Fig. 4.1.

Oct/Nov 2017

What might stop a species from becoming endangered?

Oct/Nov 2018

What is employed in the conservation of species?

Oct/Nov 2018

A country’s government brought in a law known as the Endangered Species Act. The aim was to conserve species that were in danger of extinction.

Oct/Nov 2019

Forest ecosystems face threats from a wide range of human activities.

Oct/Nov 2019

What factors can cause species to become endangered?

Oct/Nov 2021

What does the term sustainable resource mean?

Oct/Nov 2021

What causes species to become endangered?

Oct/Nov 2021

What does the term sustainable resource mean?

Oct/Nov 2021

Fig. 5.1 depicts people fishing on both a large scale and a small scale. Every kind of fishing may have a harmful effect on fish stocks.

Oct/Nov 2021

Which statement concerning sustainable resources is correct?

Oct/Nov 2022

Which method is the least sustainable for helping to maintain a fish population in a lake?

Oct/Nov 2022

Which definition of sustainable development is the correct one?

Oct/Nov 2022

One way to conserve fish stocks is to set a minimum mesh size for fishing nets. How is the mesh size selected so that a particular fish species is conserved?

Oct/Nov 2023

What term is used to describe the number of different species in an area?

Oct/Nov 2023

Fig. 5.1 illustrates how the percentage of total global fish stocks that are overfished and the percentage that are sustainable have changed.

Oct/Nov 2023

Which of the following statements about conservation is correct?

Oct/Nov 2024

What methods can be used to conserve fish stocks?

Oct/Nov 2024

Which statement explains what a sustainable resource is?

Oct/Nov 2025

What raises the likelihood of conserving endangered species?

Oct/Nov 2025

Which method is not used to conserve endangered animal species?

Oct/Nov 2025