Explain how the salinity (salt concentration) of an estuary affect the kind of organism that live there?

Most marine organisms have internal salt concentration higher than

freshwater and take on water by osmosis in estuaries

• Osmoconformers, e.g., molluscs, worms, maintain osmotic balance by

allowing body fluids to change with salinity of water

• Osmoregulators, e.g., fish, crabs, keep salt concentration of body fluids

more or less constant via active transport.

correct answer: understand the different control methods available

integrated pest management is an strategy that is based on the ecosystem and try to prevent the pest and the damage caused by them by applying combination of technique like habitat manipulation, biological control and use of resistant varieties.

the main aim of the integrated pest management is not to completely eliminate the pest but to strengthen the ecosystem so that conditions are favorable for plants and unfavorable for pests.