ESTUARY and INTERTIDAL ZONE EVALUATION

Organisms that live in the intertidal zone are adapted to crashing waves and tidal changes. How do barnacles prevent being washed away?

• They open their shells

• They cling tightly to rocks

• Barnacles go with the waves

• They store much salt in their bodies

How do organisms exposed to air be able to prevent drying out?

• They seal completely their shells

• Organism store much water in their bodies

• They move up to zones that have plenty of water

• Organism feed on other organisms that are watery

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

• Planktons are producers so their removal may not affect.

• 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 shores birds feed on the mudflats of estuaries. When would be the best time for the birds to catch stranded fish and invertebrates?

• daytime

• high tide

• low tide

• nighttime

In many desert regions, water is diverted from streams and rivers to people in cities. How does this affect the animals in the area?

• The animals migrate to tropical rainforests

• The animals move closer to others to get food

• The animals stop searching for food and water

• The animals become more active in daylight hours