<span>The cell membrane acts as the gatekeeper of the cell, determining what goes in and out.</span>
<h2><em>Why is it sometimes hard to establish an MPA?</em></h2>
- <em>Arguably, it is difficult to declare such an MPA successful, when <u>the human populations responsible for degradation have been removed</u>, and its mere establishment is rife with such political contention. Issues also arise when considering the resources needed to support a large-scale MPA.</em>
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Answer:
When carbon dioxide dissolves in seawater, the water becomes more acidic and the ocean’s pH (a measure of how acidic or basic the ocean is) drops. Even though the ocean is immense, enough carbon dioxide can have a major impact. In the past 200 years alone, ocean water has become 30 percent more acidic, faster than any known change in ocean chemistry in the last 50 million years.
Explanation:
Watershed is the place where water of rain and snow get stored. The watershed contains surface water-and wetlands--and all the underlying ground water,lakes, streams, reservoirs. Lake is the major component of the watershed . The watershed can be used for various purpose like dams, hydrological modification etc.