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| Read each sentence and identify the word/phrase that you believe correctly completes the statement. Then, click on the arrow to see if your answer is correct. 1. The is the material on which an organism lives. 2. On the east coast of North America, rocky shores are common only north of . They dominate the and are practically absent on the . 3. Animals that live on the substrate surface are called . Those that burrow are called . 4. Zonation in the rocky intertidal is related to the difference in time at different heights. Usually the upper limit of a zone is set by , the lower limit by . 5. Wave causes waves to bend and become more parallel to the shore. Wave energy is focused at . 6. attach mussels to the rock. Molluscs such as use a muscular foot. 7. is usually the limiting resource for rocky intertidal populations. 8. Typically, the most common inhabitants of the high intertidal are . 9. Barnacles usually occupy the uppermost part of the . Their upper limit is set by ; predation by largely determines their lower limit. 10. Sea stars are called because they play a central role in the structure of rocky intertidal communities. 11. The occurrence of a regular pattern of recovery after a community is disturbed is called . Typical stages of this in the rocky intertidal are a followed by seaweeds, then , and finally . The final stage in the process is called the . 12. The lower intertidal is dominated by . , as well as space, is an important limiting resource here. 13. is relatively coarse and contains little organic matter. It is found in areas. Silt and together are called , which is fine and organic-rich. Muddy bottoms are found in areas. 14. The most important food source for soft-bottom intertidal animals is . As a result, most are feeders. |