How does settlement in a landfill potentially pose a threat to ground and surface water resources? What will be an ideal response?
Settlement can promote ponding of surface water and can cause cracks to appear in the landfill. These
can penetrate the soil layers emplaced to seal the cells of the landfill and thereby allow surface water to
infiltrate. This water can become highly contaminated leachate with the potential to escape through
other cracks into the surrounding environment
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Over the past 30 years, the quality of outdoor air in most developed countries has greatly improved.
Answer the following statement true (T) or false (F)
Genes are segments of ____________________
Fill in the blanks with correct word
Which of the following is accurate with regards to the balance of nature hypothesis?
a. It is currently viewed as the most accurate description of how ecological succession can arise at a climax community. b. It is the historically held equilibrium model of succession in which, once achieved, a climax community will be dominated by a few long-lived plant species. c. It suggests that there are always an appropriate number and diversity of producers to allow an ever-increasing number of primary consumers to inhabit a changing community. d. It suggests that the pathway of ecological succession is not predictable. e. It is an example of something that scientists were able to disprove conclusively.
Cnidarians exhibit bilateral symmetry, an advancement from the phylum Porifera
a. True b. False