Human Impact Biodiversity Pollution And Conservation

9.State three reasons for conservation programmes.

10.Explain how deforestation can lead to an increase in carbon dioxide in the atmosphere.

11.Complete the sentences about deforestation.

12.Match each conservation measure with its description.

13.What is biodiversity?

14.Which of the following is a major reason for habitat destruction by humans?

15.Deforestation can lead to an increase in carbon dioxide in the atmosphere.

16.Which of the following is NOT a direct consequence of deforestation?

17.Which of the following are reasons why a species may become endangered? (Select all that apply)

18.Arrange the following steps in a conservation programme for an endangered animal species in the correct order:

19.Which of the following is a conservation measure for plants?

20.Match each human activity with its main effect on biodiversity.

21.Arrange the following events in the order they occur when deforestation leads to flooding:

22.Which of the following are conservation measures that can help endangered species? (Select all that apply)

23.Which of the following is a reason why a species may become endangered?

24.Which of the following are reasons for conservation programmes? (Select all that apply)

25.Put the following steps in a captive breeding programme in the correct order:

26.A species with low genetic variation is more likely to become extinct due to environmental changes.

27.Match each undesirable effect of deforestation with its explanation.

28.A student measures the biodiversity of two ecosystems: a tropical rainforest and a nearby oil palm plantation. She counts the number of different species in a 10 m² quadrat in each ecosystem. Which set of results is most likely?

29.A conservationist collects data on the number of individuals of an endangered bird species over five years. The data are shown in the table. | Year | Number of birds | |---|---| | 1 | 250 | | 2 | 230 | | 3 | 210 | | 4 | 190 | | 5 | 170 | What is the percentage decrease in the bird population from Year 1 to Year 5?

30.Which of the following are reasons why habitat destruction reduces biodiversity? (Select all that apply)

31.A seed bank is a conservation measure that stores seeds of endangered plant species to preserve genetic diversity.

32.Match each conservation method with its correct description.

33.A factory releases a pollutant into a river. Scientists measure the number of different species at points downstream. The results are shown. | Distance downstream (km) | Number of species | |---|---| | 0 (factory) | 5 | | 2 | 8 | | 4 | 15 | | 6 | 20 | What can be concluded from the data?

34.Arrange the following events in the order they occur when deforestation leads to increased carbon dioxide in the atmosphere.

35.A fish species' population in a lake was recorded over 10 years. In year 5, a new predator was introduced. | Year | Fish population | |---|---| | 5 | 1000 | | 10 | 400 | What is the approximate percentage decline in the fish population from year 5 to year 10?

36.A conservationist wants to compare the biodiversity of two forests. She uses the same sampling method in each forest. Which of the following would give the most reliable comparison?

37.Which of the following are valid methods for estimating the population size of a mobile animal species in a habitat? (Select all that apply)

38.A seed bank stores seeds of endangered plant species in order to preserve genetic diversity.

39.Match each conservation measure with its correct description.

40.Arrange the following events in the order they occur when deforestation leads to flooding.

41.A student measures the biodiversity of a pond using a net. She takes 5 samples and counts the number of different species in each sample. The results are: 8, 7, 9, 8, 10. What is the mean number of species per sample?

42.Which of the following are undesirable effects of deforestation? (Select all that apply)

43.Arrange the following steps in the order they occur when deforestation leads to increased carbon dioxide in the atmosphere.

44.What is an endangered species?

45.A student counts the number of different species in a 1 m² quadrat in a grassland. She finds 5 species. She repeats this in 9 other random locations and records the following numbers of species: 4, 6, 5, 3, 7, 5, 4, 6, 5. What is the mean number of species per quadrat?

46.A lake is polluted by fertiliser runoff, which increases the nitrate concentration in the water. Over the following weeks, the number of fish species living in the lake decreases. Which statement best explains this decrease in fish species diversity?

47.Which of the following is a direct result of deforestation that leads to increased flooding?

48.Seed banks are a conservation measure that can help preserve plant species from extinction.

49.A student uses a quadrat to estimate the number of different plant species in a grassland. She places 10 quadrats randomly and counts 4, 5, 3, 6, 4, 5, 4, 3, 5, 6 species respectively. What is the mean number of species per quadrat?

50.Complete the sentence:

51.A species has a population of 500 individuals. Due to habitat loss, the population decreases by 30% each year. How many individuals remain after one year?

52.State one reason why high biodiversity is important for stable ecosystems.

53.Describe two reasons why conservation programmes are important for scientific reasons.

54.Describe how you could use a quadrat to estimate the biodiversity of plant species in a grassland ecosystem.

55.Explain how deforestation can lead to loss of soil fertility.

56.A species has a population of 500 individuals. Due to habitat loss, the population decreases by 30% each year. How many individuals remain after one year?