Answer:
Less oxygen dissolved in the water is often referred to as a “dead zone” because most marine life either dies, or, if they are mobile such as fish, leave the area. Habitats that would normally be teeming with life become, essentially, biological deserts.
Hypoxic zones can occur naturally, but scientists are concerned about the areas created or enhanced by human activity. There are many physical, chemical, and biological factors that combine to create dead zones, but nutrient pollution is the primary cause of those zones created by humans. Excess nutrients that run off land or are piped as wastewater into rivers and coasts can stimulate an overgrowth of algae, which then sinks and decomposes in the water. The decomposition process consumes oxygen and depletes the supply available to healthy marine life.
Dead zones occur in coastal areas around the nation and in the Great Lakes — no part of the country or the world is immune. The second largest dead zone in the world is located in the U.S., in the northern Gulf of Mexico.
Explanation:
A specialized animals inability to rapidly adapt to a changing environment
Explanation:
Eclipse occurs when the shadow of planetary body is cast on another body. This makes part of the planetary body where the shadow is cast to experience darkness.
- Solar eclipse occurs when the moon comes between the sun and the earth.
- This causes the shadow of the moon to be cast on the earth.
- Since the moon is smaller than the earth and the earth is spherical in shape, some part of the earth will experience the eclipse.
- Other parts facing the sun will have daylight normally.
- Not all parts of the earth faces the sun at all times due to the shape and rotation of the earth on its axis. Only the part facing the sun and where the moon shadow falls will experience the eclipse.
- The moon is also smaller than the earth and the sun and so its shadow cannot cover the whole earth. It cannot perfectly obstruct light from falling on earth.
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Answer:
1, 2, 3, 4, 5 is the correct answer.
Explanation:
Cerebrospinal fluid is present in the spinal cord and it encompasses the brain.
The main functions of the Cerebrospinal fluid are
- To protect the brain and spinal cord from shock.
- To provide nutrients to a nervous system.
- To remove the waste products from a cerebral metabolism.
- To filter the chemicals from the blood.
- It controls constant pressure between the brain and skull.
- It regulates the pH homeostasis.
- It provides the brain to control its density.
