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Q: (a) What is the amount of cellulose in plant cell? Describe the molec- ular structure of cellulose.…
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Q: er Hardy-Weinberg equilibrium?
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Q: Define homeostasis and explain its significance
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4) Explain counter-current flow and its importance to aquatic species. (short answer please)
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- 1. a) State three (3) advantages and three (3) disadvantages of withdrawing groundwater.Which of the following does not vary predictably with the depth of the aquatic environment? a. dissolved oxygen c. penetration by sunlight b. temperature d. salinityAnswer the following questions: 1.) How does wind, evaporation and tide in fluence the distribution of salinity in the estuary? 2.) Why is it a problem to the animals lacking siphons to live in the sediment? List two problems.
- Which of the following does not vary predictably with the depth ofthe aquatic environment?a. dissolved oxygen b. temperature c. penetration by sunlight d. salinitya) What substances can make water in lakes and ponds hard? b) Are these substances generally harmful or are they beneficial to organisms living in the water?Explain the effect of dumping untreated sewage into a pond on the eutrophication of the pond. A. The effect of sewage that has primary treatment? B. The effect of sewage that has secondary treatment? C. Contrast your previous answers with the effect of each type of sewage on a fast-moving water
- Discuss three significant impacts of acid deposition on freshwater and forest ecosystemHow do bio-indicators determine the health of a water system? A. A few species of macro-invertebrates will be present in a healthy body of water B. Many different species of macro-invertebrates will be present in a healthy body of water C. No species of macro-invertebrates will be present in a healthy body of water D. There is no relationship between the number of species of bio-indicators and the health of a body of waterAquatic organisms that are hypoosmotic relative to the surrounding water tend to A. Gain water from the environmentB. Gain salts from the environmentC. Both of the aboveD. None of the above
- CASE STUDY CONNECTION California’s governor has put you in charge of water policy for the state. Aquifers beneath the state have been overpumped, and many wells have run dry. Agricultural production in the state is down, and farmers are clamoring for you to do something. Meanwhile, more water is needed for burgeoning urban populations in cities such as Los Angeles and San Francisco. What policies would you consider to restore California’s water supply? Would you try to take steps to increase supply, decrease demand, or both? Explain why you would choose such policies.Explain the environmental issues that would most likely arise from the water transfer.Given reason for the following :– (a) Aquatic species are more comfortable in cold water than in warm water. (b) To avoid bends scuba divers use air diluted with helium. (c) Cold drinks bottles are sealed under high pressure.
