40. Which of the following is a reason why coral reefs are impertant? A. Suppoet

Question

40. Which of the following is a reason why coral reefs are impertant? A. Suppoet food chains and ocean ecosystems B. May be used for medicines a research for potential cures to human C. Provide a barrier to protect coastlines from waves and erosion D. All of the above are correct How should people and cities NOT prepare for floods? A. B. C. 41. levees and channel improvement regulate development stay in cars 42. Which of the following is true about wetlands and wildlife? A. They help reduce food supplies to the food web B. They provide overfly zones for migratory birds. C. They provide hoenes and nurseries to their young 43. The survival of polar bear populations are threatened due to.. A. extreme ice and glacier melt. B. chemical pollution in the Arctic Ocean. C. reduced seal populations. 44. Which of the following describes a salt marsh ecosystem? A. Attracts many animals that come in to feed B. Barren with little plant or animal life C. D. Low productivity in terms of plant material Both a and e are correct 4S. Which of the following describes a lentic system? A. Becomes deeper over time from depositing sediments B. May have different temperatures from the top to bottom C. Environments include lakes and streams D. All of the above are correct What do all cnidarians have in common? A. pores B. brains 46. _ C tentacles with stinging cells 47. What do all echinoderms have in common? A. B. C. They all have spiny skins or exoskeletons. They all live in the same place. They all have jointed appendages

Explanation / Answer

40.D. All of above

Above all functions coral reefs do

41.c.stays in car

42.B.

43.A.extreme ice and glacier melts.

44.A. AttractAmany animals that come into feed

45.D. All of above

46.C. Tentacles with stinging cells

47.C. Jointed appendages

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