Top answers

Explain two examples of evolution in response to environmental change; one must be antibiotic resistance in bacteria.

Antibiotic resistance in bacteria is a common problem. It results from the transfer of a gene that gives resistance to a specific antibiotic usually by means of a plasmid to a bacterium. Some bacteria will t...
ZK
21733 Views

Outline the consequences of a global temperature rise on arctic ecosystems.

· Changes in arctic conditions (arctic ice cap may disappear, permafrost will melt during the summer) · As the ice melts, sea levels will rise and flood low lying areas of land. · Expansion of temperate spec...
ZK
9452 Views

Outline the precautionary principle.

The precautionary principle holds that, if the effects of a human-induced change would be very large, perhaps catastrophic, those responsible for the change must prove that it will not do harm before proceed...
ZK
6159 Views

Analyze the changes in concentration of atmospheric carbon dioxide using historical records.

Recent Trends: ▪ Atmospheric carbon dioxide concentrations have been measured at the Mauna Loa atmospheric observatory in Hawaii from 1958 and has since been measured at a number of different locations globa...
ZK
4963 Views

Draw and label a diagram of the carbon cycle to show the processes involved.

Carbon is one of the main elements found in all organic molecules including carbohydrate, protein and lipid. Processes : · Photosynthesis by terrestrial plants and algae (freshwater and oceans) in which atmo...
ZK
15867 Views