Living ang Non living Things in estuary

One of the fastest swimming crabs in the world is the blue crab. Which of the following is an adaptation of the crab for this?

• jointed legs

• large claws

• body shape

• paddle-like rear feet

If the planktons are removed from the estuary, what may happen to the estuarine food web?

• Planktons are producers so their removal may not have an effect.

• The other animals in the estuary will have to find other food sources.

• Removal of any organism like the plankton will greatly affect the ecosystem.

• Filter feeders like oysters and clams don’t depend on the presence of plankton.

Many shore birds feed on the mud flats of estuaries. When would be the best time for the birds to catch stranded fish and invertebrates?

• low tide

• high tide

• daytime

• nighttime

4. Estuaries that are permanently open for long periods by heavy rains tend to have _________.

• higher diversity

• lower diversity

• same diversity

• equal diversity

Which of the following best describes the salinity of Estuary water?

• Equal to the salinity of river water

• Less than the salinity of river water

• Less than the salinity of ocean water

• Greater than the salinity of ocean water