Ask Doubt
Explain the risks to a species if its population size decreases, reducing genetic variation (knowledge of genetic drift is not required)
1 Answer Describe the use of artificial insemination (AI) and in vitro fertilisation (IVF) in captive breeding programmes
1 Answer Describe the reasons for conservation programmes, limited to: (a) maintaining or increasing biodiversity (b) reducing extinction (c) protecting vulnerable ecosystems (d) maintaining ecosystem functions, limited to nutrient cycling and resource provision, including food, drugs, fuel and genes
1 Answer Describe how endangered species can be conserved, limited to: (a) monitoring and protecting species and habitats (b) education (c) captive breeding programmes (d) seed banks
1 Answer Explain why organisms become endangered or extinct, including: climate change, habitat destruction, hunting, overharvesting, pollution and introduced species
1 Answer State that some resources can be conserved and managed sustainably, limited to forests and fish stocks
1 Answer Describe a sustainable resource as one which is produced as rapidly as it is removed from the environment so that it does not run out
1 Answer Explain the process of eutrophication of water, limited to: • increased availability of nitrate and other ions • increased growth of producers • increased decomposition after death of producers • increased aerobic respiration by decomposers • reduction in dissolved oxygen • death of organisms requiring dissolved oxygen in water
1 Answer Describe the sources and effects of pollution of the air by methane and carbon dioxide, limited to: the enhanced greenhouse effect and climate change
1 Answer Describe the effects of non-biodegradable plastics, in both aquatic and terrestrial ecosystems
1 Answer
Sourav Pan
Sourav Pan
Sourav Pan
Sourav Pan
Sourav Pan
Sourav Pan
Sourav Pan